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Should you use your retirement savings to pay off debt? Three things to keep in mind

<p><em><a href="https://theconversation.com/profiles/bomikazi-zeka-680577">Bomikazi Zeka</a>, <a href="https://theconversation.com/institutions/university-of-canberra-865">University of Canberra</a> and <a href="https://theconversation.com/profiles/jasmine-kinsman-1438670">Jasmine Kinsman</a>, <a href="https://theconversation.com/institutions/nelson-mandela-university-1946">Nelson Mandela University</a></em></p> <p>A host of countries have taken steps to reform the terms under which people can access their retirement benefits. South Africa is the most recent. In 2024 it <a href="https://theconversation.com/south-africa-has-changed-its-retirement-rules-to-help-boost-country-savings-how-it-will-work-233287">introduced changes</a> that allow access to some retirement savings while ensuring that most of the money is still preserved for later.</p> <p>Other countries that have changed the rules to allow members to dip into their savings before retirement include Australia, Chile, India and Portugal. Changes were introduced to ease the financial strain caused by COVID-19 pandemic lockdowns. People across the world are grappling with debt and the cost of living.</p> <p><a href="https://www.treasury.gov.za/comm_media/press/2024/2024%20Two-pot%20System%20Updated%20%20FAQ%20August%202024.pdf">Policymakers</a> have considered this an avenue that offers financially distressed fund members the flexibility to access their retirement funds while still supporting long-term retirement savings. Retirement funds are also often the only sizeable savings that fund members have.</p> <p>A recent report by South Africa’s <a href="https://www.discovery.co.za/portal/business/top-reasons-for-two-pot-withdrawal-requests">Discovery Corporate and Employee Benefits</a>, which represents 3,000 employers that provide pension and provident funds for just over one million employees, found that people aged between 35 and 45 made the most claims to access the savings component of their retirement.</p> <p>When asked what they used the funds for, 24% of members said their withdrawals were for financing home or car expenses. Another 21% of members were using their funds to pay off short-term debt. The majority of members who withdrew their retirement savings were low-income earners (earning up to R125,000 or US$7,000 a year). On the other hand, withdrawals were lowest among high-income earners (earning more than R1 million or US$56,000 a year).</p> <p>This data provides evidence that most low- to middle-income South African consumers are grappling with the trade-off between preserving their capital for retirement and meeting their monthly financial obligations.</p> <p>Given that everyone’s financial situation, goals and needs are different, it’s always best to speak to a financial advisor to assess whether using your retirement savings to pay off debt will be a sound move. But, as academics who have focused on financial planning, we offer three pointers to consider:</p> <ul> <li> <p>understand what you owe, to whom, and what it’s costing you</p> </li> <li> <p>plan beyond paying off debt</p> </li> <li> <p>weigh the pros and cons carefully.</p> </li> </ul> <h2>Know which debt to settle first</h2> <p>Debt with a high interest rate often takes longer to repay, because at the start of the loan repayment period, most of the repayments are going towards interest payments – not reducing the capital amount. If you use your retirement proceeds towards this, it could shorten the period that it would take to settle the loan and reduce the interest repayments, which are compounded according to the outstanding loan balance.</p> <p>Short-term loans, such as those with a repayment term of up to 18 months, tend to have higher interest rates. Unsecured debt, which is debt that is not tied to an asset, also attracts high interest rates because they have little to no collateral requirements. Collateral provides the lender with a guarantee of compensation in the event of default. When there is no collateral, the cost of debt becomes more expensive. Using your retirement proceeds towards settling these short-term loans can free up cash that can be used towards settling other debt and will improve your credit score.</p> <h2>Understanding borrowing behaviour</h2> <p>Using your retirement savings to settle debt should be a priority if you have a plan in place to ensure that your overall financial position will improve. Once the debt is cleared, consider how you can use your free cash in your favour. This could mean boosting your savings or acquiring assets and investments.</p> <p>But if retirement savings are being used to pay off debt while you accumulate more debt, this indicates on ongoing cycle of debt. For example, paying off the minimum amount due on a loan but also consuming the balance that becomes available on the same loan is a sign of poor borrowing behaviour. A more extreme example is taking on more debt to service existing debt.</p> <p>Without a change in borrowing behaviour, using your retirement savings to pay off debt will leave you worse off. You will have missed out on the opportunity to grow your retirement savings and you will have got into more debt.</p> <h2>Debt repayments vs retirement returns</h2> <p>When considering withdrawing from your retirement savings to pay down debt, it’s also important remember this will be at the expense of building your retirement nest egg. For instance, if a 35-year-old were to draw down R30,000 from their retirement fund, that same amount could have grown their retirement capital by over R200,000 by the time they reached 55 years old (assuming an investment return of 10%).</p> <p>Withdrawing your retirement savings on a frequent basis could also mean you may need to work longer and past your intended retirement age to compensate for the withdrawals. Or you may need to find ways to supplement your retirement savings through other investments, or consider reducing your standard of living at retirement.</p> <h2>Is this a sound move?</h2> <p>Remember, withdrawal from retirement savings is subject to tax.</p> <p>While retirement may seem far off when there are more pressing financial needs, using your savings to pay down debt has its advantages and drawbacks. Since withdrawals are being used to pay for expenses and service debt, it’s also important to reflect on borrowing behaviours that may need to be corrected. Otherwise, using retirement savings could become a financial crutch that could make your retirement income less secure.</p> <p>Settling debt using your retirement savings should be done after careful consideration and planning. If in doubt, speak to a financial advisor.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244837/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/bomikazi-zeka-680577"><em>Bomikazi Zeka</em></a><em>, Associate Professor in Finance and Financial Planning, <a href="https://theconversation.com/institutions/university-of-canberra-865">University of Canberra</a> and <a href="https://theconversation.com/profiles/jasmine-kinsman-1438670">Jasmine Kinsman</a>, Senior Lecturer in Financial Planning and Certified Financial Planner, <a href="https://theconversation.com/institutions/nelson-mandela-university-1946">Nelson Mandela University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/should-you-use-your-retirement-savings-to-pay-off-debt-three-things-to-keep-in-mind-244837">original article</a>.</em></p>

Money & Banking

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Around 3% of us will develop a brain aneurysm in our lives. So what is it and how do you treat it?

<p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a> and <a href="https://theconversation.com/profiles/jessica-nealon-1481995">Jessica Nealon</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p>Australian radio host Kyle Sandilands announced on air that he <a href="https://www.abc.net.au/news/2025-02-03/kyle-sandilands-brain-aneurysm-diagnosis/104888826">has a brain aneurysm</a> and needs urgent brain surgery.</p> <p>Typically an aneurysm occurs when a part of the wall of an artery (a type of blood vessel) becomes stretched and bulges out.</p> <p>You can get an aneurysm <a href="https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/aneurysm">in any blood vessel</a>, but they are most common in the brain’s arteries and the aorta, the large artery that leaves the heart.</p> <p>Many people can have a brain aneurysm and never know. But a brain (or aortic) aneurysm that ruptures and bursts can be fatal.</p> <p>So, what causes a brain aneurysm? And what’s the risk of rupture?</p> <h2>Weakness in the artery wall</h2> <p>Our arteries need strong walls because blood is constantly pumped through them and pushed against the walls.</p> <p>An <a href="https://www.healthdirect.gov.au/aneurysms">aneurysm</a> can develop if there is a weak part of an artery wall.</p> <p>The walls of arteries are made of three layers: an inner lining of cells, a middle layer of muscle and elastic fibres, and a tough outer layer of mostly collagen (a type of protein). Damage to any of these layers causes the wall to become thin and stretched. It can then balloon outward, leading to an aneurysm.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4399795/">Genetics</a> and <a href="https://www.ninds.nih.gov/health-information/disorders/cerebral-aneurysms">certain inherited disorders</a> can cause weak artery walls and brain aneurysms in some people.</p> <p>For all of us, our artery walls become weaker as we age, and brain aneurysms are more common as we get older. The <a href="https://www.ncbi.nlm.nih.gov/books/NBK557867/">average age for a brain aneurysm</a> to be detected is 50 (Sandilands is 53).</p> <p>Females have a higher risk of brain aneurysm than males <a href="https://www.ncbi.nlm.nih.gov/books/NBK507902/">after about age 50</a>. Declining oestrogen around menopause reduces the collagen in the artery wall, causing it to become weaker.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/646696/original/file-20250204-15-i55mtq.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=3 2262w" alt="An illustration showing a brain aneurysm." /><figcaption><span class="caption">A brain aneurysm occurs when a part of the wall of an artery balloons out.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-vector/human-brain-blocking-stroke-aneurysm-disease-2171173339">Alfmaler/Shutterstock</a></span></figcaption></figure> <p>High blood pressure can increase the risk of a brain aneurysm. In someone with high blood pressure, blood inside the arteries is pushed against the walls with greater force. This can <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3163429/">stretch and weaken the artery walls</a>.</p> <p>Another <a href="https://www.aihw.gov.au/reports/heart-stroke-vascular-diseases/hsvd-facts/contents/introduction">common condition</a> called atherosclerosis can also <a href="https://www.ninds.nih.gov/health-information/disorders/cerebral-arteriosclerosis">cause brain aneurysms</a>. In atherosclerosis, plaques made mostly of fat build up in arteries and stick to the artery walls. This directly damages the cell lining, and weakens the muscle and elastic fibres in the middle layer of the artery wall.</p> <h2>Several lifestyle factors increase risk</h2> <p>Anything that increases inflammation or causes atherosclerosis or high blood pressure in turn increases your risk of a brain aneurysm.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6527044/">Smoking and heavy drinking</a> affect all of these, and nicotine <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6214667/">directly damages</a> the artery wall.</p> <p>Sandilands mentioned <a href="https://www.news.com.au/entertainment/tv/radio/kyle-sandilands-reveals-shock-health-diagnosis-i-may-be-dead/news-story/62f9f05c6f0a03702632ec8d622cf97a">his cocaine use</a> in discussing his diagnosis. He said: "The facts are, a life of cocaine abuse and partying are not the way to go."</p> <p>Indeed, cocaine abuse <a href="https://www.nhs.uk/conditions/brain-aneurysm/causes/">increases the risk of a brain aneurysm</a>. It causes very high blood pressure because it causes arteries to spasm and constrict. Cocaine use is also <a href="https://www.sciencedirect.com/science/article/abs/pii/S1878875023017400">linked to worse outcomes</a> if a brain aneurysm ruptures.</p> <p><a href="https://onlinelibrary.wiley.com/doi/full/10.1111/ejn.15992">Stress</a> and a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6243058/#:%7E:text=High%2Dfat%20diets%20(HFDs),many%20organs%20(see%20text).">high-fat diet</a> also increase inflammation. <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/atherosclerosis#:%7E:text=Atherosclerosis%20is%20thickening%20or%20hardening,activity%2C%20and%20eating%20saturated%20fats.">High cholesterol</a> can also cause atherosclerosis. And <a href="https://www.aihw.gov.au/reports/heart-stroke-vascular-diseases/hsvd-facts/contents/risk-factors/overweight-and-obesity">being overweight</a> increases your blood pressure.</p> <p><a href="https://www.ahajournals.org/doi/10.1161/JAHA.121.022277">A study</a> of more than 60,000 people found smoking and high blood pressure were the strongest risk factors for a brain aneurysm.</p> <h2>Is it always a medical emergency?</h2> <p>About <a href="https://www.ncbi.nlm.nih.gov/books/NBK557867/">three in 100 people</a> will have a brain aneurysm, varying in size from <a href="https://www.ncbi.nlm.nih.gov/books/NBK557867/">less than 5mm to more than 25mm</a> in diameter. The majority are only discovered while undergoing imaging for something else (for example, head trauma), because small aneurysms may not cause any symptoms.</p> <p>Larger aneurysms can cause symptoms because they can <a href="https://www.mayoclinic.org/diseases-conditions/brain-aneurysm/symptoms-causes/syc-20361483">press against brain tissues and nerves</a>.</p> <p>Sandilands described “<a href="https://www.abc.net.au/news/2025-02-03/kyle-sandilands-brain-aneurysm-diagnosis/104888826">a lot of headache problems</a>” leading up to his diagnosis. Headaches can be due to <a href="https://www.mayoclinic.org/diseases-conditions/brain-aneurysm/symptoms-causes/syc-20361483">minor leaks of blood</a> from the aneurysm. They indicate a risk of the aneurysm rupturing in subsequent days or weeks.</p> <p>Less than <a href="https://www.nature.com/articles/s41467-024-46015-2">one in 100 brain aneurysms will rupture</a>, often called a “brain bleed”. This causes a <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/subarachnoid-hemorrhage#:%7E:text=A%20subarachnoid%20hemorrhage%20is%20bleeding,brain%20and%20inside%20the%20skull.">subarachnoid haemorrhage</a>, which is a <a href="https://www.nhs.uk/conditions/subarachnoid-haemorrhage/">type of stroke</a>.</p> <p>If it does occur, rupture of a brain aneurysm is <a href="https://www.ncbi.nlm.nih.gov/books/NBK507902/">life-threatening</a>: nearly one in four people will die within 24 hours, and one in two within three months.</p> <p>If someone’s brain aneurysm ruptures, they usually experience a sudden, severe headache, often described as a “<a href="https://www.bafound.org/blog/three-signs-your-bad-headache-might-be-a-ruptured-brain-aneurysm/">thunderclap headache</a>”. They may also have <a href="https://www.ninds.nih.gov/health-information/disorders/cerebral-aneurysms">other symptoms of a stroke</a> such as changes in vision, loss of movement, nausea, vomiting and loss of consciousness.</p> <h2>Surgery can prevent a rupture</h2> <p>Whether surgery will be used to treat a brain aneurysm depends on its size and location, as well as the age and health of the patient. The medical team will balance the potential benefits with the risks of the surgery.</p> <p>A small aneurysm with low risk of rupture will usually <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2323531/">just be monitored</a>.</p> <p>However, once a brain aneurysm reaches <a href="https://www.ncbi.nlm.nih.gov/books/NBK507902/">7mm or more</a>, surgery is generally needed.</p> <p>In <a href="https://www.nhs.uk/conditions/brain-aneurysm/treatment/#:%7E:text=A%20cut%20is%20made%20in,permanently%20clamped%20on%20the%20aneurysm.">surgery to repair a brain aneurysm</a>, the surgeon will temporarily remove a small part of the skull, then cut through the coverings of the brain to place a tiny metal clip to close off the bulging part of the aneurysm.</p> <p>Another option is <a href="https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/endovascular-coiling">endovascular</a> (meaning within the vessel) coiling. A surgeon can pass a catheter into the femoral artery in the thigh, through the aorta to the brain. They can then place a coil inside the aneurysm which forms a clot to close off the aneurysm sac.</p> <p><a href="https://medlineplus.gov/ency/article/007372.htm">After either surgery</a>, usually the person will stay in hospital for up to a week. It can take <a href="https://www.healthline.com/health/brain-aneurysm-clipping-surgery#recovery">6–8 weeks</a> for full recovery, though doctors may continue monitoring with annual imaging tests for a few years afterwards.</p> <p>You can <a href="https://www.medicalnewstoday.com/articles/how-to-prevent-a-brain-aneurysm#prevention">lower your risk of a brain aneurysm</a> by not smoking, moderating alcohol intake, eating a healthy diet, exercising regularly and maintaining a healthy weight.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/248882/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, Associate Professor of Medical Sciences, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a> and <a href="https://theconversation.com/profiles/jessica-nealon-1481995">Jessica Nealon</a>, Senior Lecturer in Medical Sciences (Neuroscience), <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/around-3-of-us-will-develop-a-brain-aneurysm-in-our-lives-so-what-is-it-and-how-do-you-treat-it-248882">original article</a>.</em></p>

Body

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When news is stressful, how do you balance staying informed with ‘doomscrolling’?

<p><em><a href="https://theconversation.com/profiles/lisa-harrison-1552123">Lisa Harrison</a>, <a href="https://theconversation.com/institutions/flinders-university-972">Flinders University</a></em></p> <p>It all begins innocently – a late-night peek at your favourite social media site before bed. You catch a headline that grabs your attention with “breaking news” you can’t afford to miss.</p> <p>Like following digital breadcrumbs, one click leads to another. Before you know it, you’re tumbling down a rabbit hole of endless updates and emotionally charged social media posts. Two hours later, your shoulders are tense, your stomach is in knots, but you can’t put your phone down.</p> <p>This endless scrolling through bad news – known as “<a href="https://www.health.harvard.edu/mind-and-mood/doomscrolling-dangers">doomscrolling</a>” – sneaks up on us.</p> <p>It’s important to stay in touch with what’s happening in the world. Being informed helps us make better decisions, engage meaningfully in our communities, and respond effectively to changes that affect our lives and those around us.</p> <p>But just like a healthy diet, we must be smart about our news consumption to avoid it <a href="https://theconversation.com/doomscrolling-is-literally-bad-for-your-health-here-are-4-tips-to-help-you-stop-190059">taking a toll on our health</a>.</p> <p>The good news is there are proven ways to stay informed without letting it take over your life. Research shows <a href="https://academic.oup.com/poq/article/84/S1/332/5866766">setting clear boundaries</a> around your news consumption can make a huge difference. So, how can you strike the right balance?</p> <h2>How to set boundaries with news consumption</h2> <p>It’s worth considering why you feel compelled to stay constantly informed. Ask yourself: “will this information change what I can do about it?”.</p> <p>Often, we scroll not because the information is actionable, but because <a href="https://www.sciencedirect.com/science/article/pii/S245195882400071X">we are trying to gain a sense of control</a> in an uncertain world.</p> <p>Research shows scrolling through negative news <a href="https://www.abc.net.au/news/2024-08-29/negative-effects-doomscrolling-young-people-existential-anxiety/104268178">can disrupt your sleep and increase anxiety</a>. To make sure your media consumption is intentional, there are a few steps you can take.</p> <p>Be picky with the news sources you read. Choose a few trusted outlets instead of letting social media algorithms decide what you see. It’s like sticking to a balanced meal plan, but for your mind.</p> <p>While engaging with the news, pay close attention to how you’re feeling. When you notice physical signs of anxiety or emotional distress, that is your cue to take a break.</p> <p>Set aside time earlier in the day with clear boundaries around your news consumption: maybe with your morning coffee or during your lunch break, whatever works for your schedule. Consider implementing a “digital sunset”, too. This is a cut-off time for news and social media, ideally an hour or two before bedtime, to give your mind time to process what you have learned without disrupting your sleep.</p> <p>The world will always be there, but you will be in a better head space to process what is happening.</p> <h2>You don’t have to feel helpless</h2> <p>Taking breaks from consuming news is not burying your head in the sand – it’s practising self care. Studies have shown that <a href="https://www.apa.org/monitor/2022/11/strain-media-overload">people who set healthy boundaries</a> around news consumption are often better equipped to engage meaningfully on important issues and take constructive action when needed.</p> <p>When you check the news, be an active consumer. Instead of endless scrolling:</p> <ul> <li> <p>choose one or two in-depth articles to read thoroughly</p> </li> <li> <p>discuss the news with colleagues, friends and family to process your feelings</p> </li> <li> <p>look for solution-focused news stories that highlight positive change</p> </li> <li> <p>take meaningful action on issues you care about.</p> </li> </ul> <p>There are also various apps and tools that can help you form healthier digital habits. <a href="https://theconversation.com/cant-focus-addicted-to-your-online-world-theres-an-app-for-that-98951">Productivity apps</a> use various approaches to help you stay focused, providing ways to snap you out of mindless scrolling.</p> <p>News curation apps and apps that allow you to save articles to read later can help you establish a balanced news diet, and remove the urgent need to read everything immediately.</p> <p>Many smartphones now come equipped with <a href="https://theconversation.com/rethinking-screen-time-a-better-understanding-of-what-people-do-on-their-devices-is-key-to-digital-well-being-243644">screen time management</a> features, such as Apple’s Screen Time or Android’s Digital Wellbeing. You can use these to monitor your scrolling habits and to manage how much time you spend on social media or news apps.</p> <p>One useful feature is to block apps from use during certain times of day or after you’ve used them for a set amount of time.</p> <h2>Stay mindful, stay engaged</h2> <p>Staying informed doesn’t mean staying constantly connected. By mindfully setting boundaries and using supportive tools, you can keep up with important events while protecting your wellbeing.</p> <p>If you’re trying productivity apps and other tools, start small. Choose one tool that resonates with you rather than trying everything at once. Set realistic goals that fit your life, and use these apps’ insights to understand your habits better.</p> <p>Pay attention to what triggers your doomscrolling and adjust your settings accordingly. Remember, these tools work best when combined with offline activities you enjoy.</p> <p>The goal isn’t to disconnect completely, but to find a sustainable balance between staying informed and maintaining peace of mind. With thoughtful boundaries and the right support tools, you can stay engaged with the world while keeping your mental health intact.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/248017/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/lisa-harrison-1552123">Lisa Harrison</a>, Lecturer in Digital Communications, <a href="https://theconversation.com/institutions/flinders-university-972">Flinders University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/when-news-is-stressful-how-do-you-balance-staying-informed-with-doomscrolling-248017">original article</a>.</em></p>

Technology

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How do mosquito repellents work? A chemistry expert explains

<p><em><a href="https://theconversation.com/profiles/daniel-eldridge-1494633">Daniel Eldridge</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p>It’s summertime, and for many of us that means plenty of time outside – and, unfortunately, mosquitoes.</p> <p>The combination of the <a href="https://theconversation.com/why-your-summer-might-be-full-of-mosquitoes-according-to-a-scientist-98369">increase in temperature and plenty of water</a> is ideal for these blood-sucking insects to make their presence felt.</p> <p>In the best-case scenario, they are a pest, delivering a highly unpleasant sting. At the other end of the spectrum, they are vectors for diseases responsible for <a href="https://www.cdc.gov/global-health/impact/fighting-the-worlds-deadliest-animal.html">more human fatalities than any other animal on Earth</a>.</p> <p>To keep them at bay, many of us will reach for the bottle of insect repellent or citronella candles in order to avoid the bite and incessant itching that comes with it. But how do these repellents actually work?</p> <h2>A complex interplay</h2> <p><a href="https://www.mcgill.ca/oss/article/health-technology/why-mosquitos-bite-you-and-how-make-them-stop">A great deal</a> of research has gone into understanding how and why female mosquitoes – they are the ones that bite us – are attracted to people.</p> <p>There is evidence showing they are attracted to the <a href="https://www.nih.gov/news-events/nih-research-matters/how-mosquitoes-detect-people">carbon dioxide</a> we exhale, lactic acid found in our sweat, and a variety of other <a href="https://pubmed.ncbi.nlm.nih.gov/24315103/">skin odours</a> and <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6482070/">volatile compounds</a> we give off. The interplay between all these factors is quite <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8906108/">complex</a>.</p> <p>To ward off mosquitoes, physical barriers such as netting make for the best protection. However, while you might put netting around a backdoor patio and barbecue, doing this for any large space is simply not practical.</p> <p>This is where repellents come in.</p> <h2>DEETerrent</h2> <p>There are a variety of mosquito repellents available.</p> <p>The most tried-and-true products are based on a substance called N,N-diethyl-meta-toluamide, more commonly referred to as DEET.</p> <p>This molecule has been commercially available since 1957, <a href="https://www.usda.gov/media/blog/2018/05/17/protecting-military-flying-foes">after the United States military discovered</a> it was an effective insect repellent.</p> <p>DEET is often used as a <a href="https://www.consumerreports.org/health/insect-repellent/how-safe-is-deet-insect-repellent-safety-a4952100929/">point of comparison</a> for <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa011699">studies</a> investigating alternatives. <a href="https://scijournals.onlinelibrary.wiley.com/doi/full/10.1002/ps.5476?casa_token=prUg_pX7fjAAAAAA%3AuEKT5PGXWU1mO4fakwQ9NSEY-0uVYBEz25zWxXjMOp5AxX5UFWENJc1UF_JdsKA45x3sSHpmJSLJSwM">Studies show that</a>, provided they are used according to direction, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4041896/">DEET products are safe and effective</a>.</p> <p>For example, it is recommended that when required, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9458079/">sunscreen is applied</a> before the repellent. DEET products are not recommended for infants.</p> <p>The exact mechanism by which DEET repels mosquitoes and other insects is <a href="https://www.tandfonline.com/doi/full/10.1080/19336934.2015.1079360#d1e132">still explored</a> <a href="https://link.springer.com/article/10.1007/s13258-020-00991-z">today</a>.</p> <p>Many studies link its success to mosquitoes having receptors that sense the presence of DEET, deterring them from closely approaching our skin. Some investigations suggest that when DEET is detected, it <a href="https://pubmed.ncbi.nlm.nih.gov/18339904/">inhibits mosquitoes’ attraction</a> to us, while others show evidence that mosquitoes “<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2518096/pdf/zpq13598.pdf">smell and avoid</a>” DEET.</p> <p>There are also numerous reports demonstrating mosquitoes don’t bite when they <a href="https://www.cell.com/current-biology/pdfExtended/S0960-9822(19)30402-6">land on</a> DEET-treated skin. This is because DEET acts as a contact-based repellent and conveys a chemical message to mosquitoes to leave. <a href="https://www.tandfonline.com/doi/full/10.1080/19336934.2015.1079360">Studies</a> <a href="https://www.cell.com/current-biology/pdfExtended/S0960-9822(19)30402-6">suggest</a> that DEET likely works through a combination of the processes described here.</p> <h2>Effective alternatives</h2> <p>Another more recent family of mosquito repellent products rely on an active ingredient called picaridin (or icaridin).</p> <p>The current consensus is that picaridin products are safe, and highly effective. For many, they are considered appealing as they <a href="https://www.sciencedirect.com/science/article/pii/S0190962207014673?casa_token=zzPMhkW9QtIAAAAA:Euk6hjWnuiem6OAq020Xv0Pu70K7LfN_siLGcK1DIyOZn-mbH7U9tKK115rAK0rYbWQ2oaMGfg#bib49">don’t have as strong a scent</a> as DEET.</p> <p>Picaridin products have been reported to be <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4270489/">equally effective</a> as DEET, or in some cases, even <a href="https://academic.oup.com/jtm/article/25/suppl_1/S10/4990399">slightly superior</a>, though the outcome depends on their concentration too.</p> <p>The other repellent regularly reported as being effective is para-menthane-3,8-diol (PMD).</p> <p>This is produced by chemical treatment of <a href="https://www.phrp.com.au/issues/december-2016-volume-26-issue-5/a-review-of-recommendations-on-the-safe-and-effective-use-of-topical-mosquito-repellents/">oil of lemon eucalyptus</a>.</p> <p>Untreated, this oil isn’t effective at repelling mosquitoes. However, <a href="https://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1573(199606)10:4%3C313::AID-PTR854%3E3.0.CO;2-O">several</a> <a href="https://journals.sagepub.com/doi/full/10.1016/j.wem.2015.11.007">studies</a> have shown that PMD is an effective mosquito repellent.</p> <p>The ability of these repellents to deter mosquitoes is <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4270489/">dose</a> <a href="https://academic.oup.com/jtm/article/25/suppl_1/S10/4990399">dependent</a>.</p> <p>In all cases, it’s important that an appropriate dose is applied, with re-application sometimes required to keep protection to a maximum. The performance of these products varies according to many other variables too, including <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4270489/">the species of mosquito</a>.</p> <h2>What about citronella?</h2> <p>Citronella products, including candles and topical formulations, are popular choices for keeping mosquitoes away.</p> <p>However, in systematic testing, these <a href="https://onlinelibrary.wiley.com/doi/10.1155/2015/361021">have been shown</a> to be <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa011699">far less effective</a> than DEET.</p> <p>Studies have also shown that <a href="https://academic.oup.com/jinsectscience/article/17/1/24/2996380?login=false">citronella candles don’t</a> <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4617422/">fend off mosquitoes</a> <a href="https://pubmed.ncbi.nlm.nih.gov/8827606/">as much</a> as you might like.</p> <p>There are many other repellent products on the market.</p> <p>Given the widespread interest in preventing mosquito bites, natural remedies abound. It’s important to recognise that natural <a href="https://academic.oup.com/jinsectscience/article/17/1/24/2996380?login=false">isn’t necessarily more effective</a> and it <a href="https://theconversation.com/what-does-a-chemical-do-addressing-misconceptions-about-chemistry-104085">isn’t necessarily safer</a>.</p> <p>In <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa011699">most reported studies</a>, DEET and picaridin are reported as having the greatest duration of protection (of the order of hours) and greatest effect on the mosquitoes. They are more thoroughly tested than many alternatives.</p> <p>When others are tested, they are often found wanting.</p> <p>One study described sound-based devices as being the repellent equivalent of <a href="https://academic.oup.com/jinsectscience/article/17/1/24/2996380?login=false">snake oil</a>. And although repellent bracelets contain working ingredients, they are largely ineffective in that form. This is because of insufficient concentrations of the active ingredient being “emitted”.</p> <p>When it comes to preventing disease transmission via mosquitoes, the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4041896/">benefits</a> of the proven repellents far outweigh the risks.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244403/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/daniel-eldridge-1494633">Daniel Eldridge</a>, Senior Lecturer in Chemistry, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/how-do-mosquito-repellents-work-a-chemistry-expert-explains-244403">original article</a>.</em></p>

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How can I keep my cat happy? 5 tips from a vet to help your feline friend live their best life

<p><em><a href="https://theconversation.com/profiles/anne-quain-12802">Anne Quain</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p>Around <a href="https://animalmedicinesaustralia.org.au/report/pets-in-australia-a-national-survey-of-pets-and-people-2/">one third of Australian households live with at least one cat</a>, yet surveys tell us the cats’ <a href="https://journals.sagepub.com/doi/10.1177/1098612X19890189">needs are not being met</a>.</p> <p>Cats may <a href="https://www.sup.org/books/media-studies/unified-theory-cats-internet">rule the internet</a>, but humans often misconstrue feline behaviour. Earlier this year, the Washington Post boldly declared <a href="https://www.washingtonpost.com/home/2024/03/12/cats-behavior-misunderstood/">cat’s arent jerks – they’re just misunderstood</a>. This was prompted by research showing that, contrary to unhelpful stereotypes, <a href="https://www.sciencedirect.com/science/article/pii/S1090023323000795">cats are not antisocial</a>. They can and do bond closely with humans.</p> <p>The more we learn about cats, the more we realise they are complex individuals with unique <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8300181/">personalities</a> and preferences, capable of <a href="https://www.nature.com/articles/s41598-024-74006-2">learning</a>.</p> <p>From understanding your cat’s language to keeping them safe and healthy – here are science-backed tips to improve the lives of your feline flatmates.</p> <h2>1. Pay attention to body language</h2> <p>Cats communicate with humans using body language and vocalisation. However, while cats direct meows at humans, and the meows vary depending on the context, humans <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7765146/">are not great at decoding them</a>. But we can read cat body language.</p> <p>For example, slow blinking is likely to indicate a <a href="https://www.nature.com/articles/s41598-020-73426-0">positive emotional state</a>. Cats who are not happy (for example, don’t want to be touched) will freeze, move away, flatten their ears, hiss, or – if they feel they have no other option – scratch or bite.</p> <p>It is better to allow cats to approach you on their terms, rather than pushing for social interaction. A cat approaching you with their tail up is giving a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8469685/">friendly signal</a>, while a tail swishing from side to side signals annoyance.</p> <p>Cats should always have the option to opt out of any interaction, like being touched. If you aren’t sure, just “<a href="https://www.companionanimalpsychology.com/p/purr-science-of-making-your-cat-happy.html">ask</a>”: stop patting them. If they walk away, they’re not keen. If they rub their head against you, they want to continue the interaction.</p> <h2>2. Provide a healthy environment</h2> <p>The American Association of Feline Practitioners and the International Society of Feline Medicine have agreed upon <a href="https://journals.sagepub.com/doi/full/10.1177/1098612X13477537">five pillars of a healthy feline environment</a>:</p> <ol> <li> <p>A safe space so that cats can retreat if frightened.</p> </li> <li> <p>Multiple, separated key resources (food, water, toileting areas, scratching areas, play areas and resting or sleeping areas) so that cats can comfortably conduct their daily activities.</p> </li> <li> <p>Opportunity for play and predatory behaviour, such as games with wand toys that simulate hunting.</p> </li> <li> <p>Positive, consistent and predictable human-cat interactions, respecting a cat’s choice about whether and how they interact.</p> </li> <li> <p>Respecting the importance of a cat’s senses by avoiding undesirable stimuli (strong smells and loud noises), and providing desirable sensory stimulation (for example, use of <a href="https://theconversation.com/are-catnip-and-treats-like-it-safe-for-cats-heres-how-they-affect-their-minds-and-moods-214947">catnip or silver vine</a>).</p> </li> </ol> <p>These pillars provide a useful checklist. If you read this and realise your cat’s food and water are right next to the litter tray, you can improve your cat’s environment (and their experiences of eating and toileting) by separating these resources right now.</p> <h2>3. Clean the litter tray!</h2> <p>A litter tray may represent an unpleasant chore to you, but the importance of a spacious litter tray to your cat cannot be overstated. Cats <a href="https://www.sciencedirect.com/science/article/pii/S0376635716302972">prefer using a clean litter tray</a>, even if they are the only cat in the household.</p> <p>Cats like to <a href="https://www.sciencedirect.com/science/article/pii/S016815911730151X">spend time in the tray</a> before, during and after toileting, and they generally <a href="https://www.sciencedirect.com/science/article/pii/S1558787814000033">prefer a large tray</a>.</p> <p>Poor litter hygiene is associated with a risk of urinary problems, which can be <a href="https://onlinelibrary.wiley.com/doi/10.1111/jvim.16389">life-threatening</a>. A <a href="https://doi.org/10.1177/1098612X19890189">survey of over 12,000 Australian cat owners</a> found that urinary problems were more common in households with a low number of litter trays per cat, less frequent removal of faeces from the trays, and the use of crystal-type cat litter.</p> <p>If you switch the type of litter you provide, a <a href="https://www.mdpi.com/2076-2615/12/8/946">slow transition</a> is recommended to allow cats to get used to the change.</p> <h2>4. Read the room</h2> <p>Do you have more than one cat? Tension between household cats is common but often overlooked, as it’s not always physical fighting. Signs of inter-cat tension can include prolonged staring, or even blocking the use of resources such as the litter tray or cat door, to prevent other cats from using them.</p> <p>In their <a href="https://journals.sagepub.com/doi/10.1177/1098612X241263465">2024 intercat-tension guidelines</a>, the American Association of Feline Practitioners note this can case chronic fear, anxiety and stress-related illnesses in cats.</p> <p>Learning to recognise and manage tension between household cats can improve the welfare of all parties.</p> <p>When you love your cat, it is tempting to seek to amplify the joy by adopting another. But many cats prefer to be the only cat in the household, and don’t cope well with a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10083434/">feline flatmate</a>. If they have positive interactions with familiar, trusted humans, they’re unlikely to be lonely.</p> <h2>5. Keep cats and other animals safe</h2> <p>Historically, domesticated cats earned their keep <a href="https://www.sciencedirect.com/science/article/pii/S0169534720300100">protecting grain stores</a> from rodents. But what constitutes responsible cat ownership has changed. Around 65% of Australia’s cat owners <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10215893/">confine their cats</a> indoors always, while 24% keep their cats confined at night.</p> <p>A major driver for indoor-only housing of cats is their <a href="https://theconversation.com/one-cat-one-year-110-native-animals-lock-up-your-pet-its-a-killing-machine-138412">predation of wildlife</a>. Another is concerns about roaming-associated risks to cats, including cat fights, infectious diseases (such as <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9546031/">feline immunodeficiency virus or FIV</a>), misadventure and motor vehicle trauma. But owners of cats kept entirely indoors were more likely to report <a href="https://www.sciencedirect.com/science/article/abs/pii/S0168159119301054?via%3Dihub">“problem” behaviours</a>.</p> <p>Ideally, cats shouldn’t be allowed to free-roam unsupervised where they can harm wildlife, even within the bounds of the property where you live. More than a third of local councils in Australia <a href="https://www.abc.net.au/news/2024-05-19/banning-pet-cats-roaming-native-animals-billions-dollars-council/103856000">now require</a> cats to be contained overnight or 24 hours a day.</p> <p>Outdoor access provides sensory stimulation, with different sights, sounds and smells. Alternatives to free roaming include providing access to a well-designed cat run, harness-training your cat, or supervising your cat.</p> <p>Cats who don’t leave home unless they’re moving house or being taken to the vet, quickly learn to associate the cat carrier with a trip to an unfamiliar environment. It doesn’t take a genius to work out that a vet visit is imminent when the carrier comes out.</p> <p>But that negative association can be changed. <a href="https://www.sciencedirect.com/science/article/pii/S0168159118302703">Cats who were rewarded with treats</a> when they approached, stepped inside or rested in the carrier for six weeks were much less stressed during veterinary visits.</p> <p>Cats are intelligent, and contrary to popular opinion, can be trained. The process can be enriching for cats and humans alike. With patience and commitment, <a href="http://www.smallanimaltalk.com/2017/04/book-review-trainable-cat-plus-that.html">you can train your cat</a> – from a simple “sit” to voluntarily stepping into the cat carrier.</p> <p>In short, give cats choice, respect their “cat-ness”, pay attention to their needs and try to see our world from their point of view. Your cat will be happier for it.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/242774/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/anne-quain-12802">Anne Quain</a>, Senior Lecturer, Sydney School of Veterinary Science, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/how-can-i-keep-my-cat-happy-5-tips-from-a-vet-to-help-your-feline-friend-live-their-best-life-242774">original article</a>.</em></p>

Family & Pets

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Top 10 must-do activities around the world in 2025

<p>Global travel brand <em>Time Out</em> has revealed their annual list of the best activities around the world. </p> <p>From a canoe trip in Australia to wildlife encounters in Singapore, here are the top 10 must-do activities and experiences around the world. </p> <p><strong>10. Take a micro cruise through the Arctic. </strong></p> <p>This year, Micro-cruise specialist Secret Atlas will be taking 12 passengers at a time through the Arctic, for a more "intimate, once-in-a-lifetime, eco-conscious trip". </p> <p>The cruise will take guests on a wildlife-spotting journey through Svalbard's lesser-known northern reaches, while the other cruise will sail past the icebergs in Northeast Greenland, including a visit to one of the most remote towns on earth. </p> <p>These trips, however, aren't cheap with prices starting at £15,500 (around AUD $30,500) for two weeks.</p> <p><strong>9. Explore the cross-border towns of Gorizia, Italy, and Nova Gorica, Slovenia</strong></p> <p>These three towns make up 2025's European Capital of Culture, with over 400 events to be held throughout the year, including a piano performance on a 200m-high bridge, as well as a food and wine event called Tastes Without Borders.</p> <p><strong>8. Go on a wildlife-spotting adventure in Singapore's new Rainforest Park </strong></p> <p>The Mandai Wildlife Reserve is opening its fifth zoological park, Rainforest Wild Asia, this year, with 10 different zones, as well as 29 different species of animals, perfect for a family outing. </p> <p><strong>7. Discover Vietnam by a vintage steam train</strong></p> <p>Time Out explained that two of the "beautifully restored vintage trains" date all the way back to the 60s, and will take passengers between "the central city of Da Nang and the former royal capital of Hue."</p> <p><strong>6. Visit the Musée Granet celebrating the father of post-impressionism</strong></p> <p>Aix-en-Provence in France is celebrating the life of post-impressionist painter Paul Cezanne in his hometown, with the exhibition displaying almost 100 of Cèzanne’s works, as well as tours around the artist’s childhood home, former estate and art studio. </p> <p><strong>5. Visit the long-awaited Harlem's Studio Museum, New York</strong></p> <p>The Studio Museum in Harlem, New York, was first opened 56 years ago, with an archive of almost 9,000 pieces from all kinds of creators. It was closed for construction almost seven years ago and will finally re-open in autumn. </p> <p><strong>4. Fly directly to Greenland </strong></p> <p>The grand opening of their brand-new international airport will make this stunning location <span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;"> </span><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;">more accessible</span><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;"> for travellers wanting to view the Northern Lights and all of the territory's natural wonders. </span></p> <p><strong><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;">3. Visit the world's first museum telling stories of migration though art</span></strong></p> <p><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;">The Fenix museum in </span>Katendrecht, Rotterdam will open on May 16 and is the first museum telling stories of migration through art. </p> <p><strong>2. Walk, ride or cycle along Murray River, Australia</strong></p> <p>"The Murray River is the crowning jewel of Australia’s Echuca region," said <em>Time Out’s</em> Saffron Swire. </p> <p>With the opening of a new multisport adventure trail this year, cyclists, hikers and paddlers alike will get to enjoy the river in a new way. </p> <p><strong>1. Join a once-every-quarter-century spiritual celebration in Rome, Italy</strong></p> <p>Italy's capital will celebrate its spiritual Jubilee this year, a Catholic festivity that's held every 25 years, with Italy expert Rebecca Ann Hughes recommending the Seven Churches Pilgrimage, "which began in the 16th century and involves a 25km walk through the city and countryside between the major basilicas." </p> <p>Check out the full list <a href="http://www.timeout.com/things-to-do/best-things-to-do-in-the-world" target="_blank" rel="noopener">here</a>. </p> <p><em>Image: Shutterstock</em></p> <p> </p>

International Travel

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Why do some people’s hair and nails grow quicker than mine?

<p><em><a href="https://theconversation.com/profiles/michelle-moscova-310728">Michelle Moscova</a>, <a href="https://theconversation.com/institutions/unsw-sydney-1414">UNSW Sydney</a></em></p> <p>Throughout recorded history, our hair and nails played an important role in signifying who <a href="https://www.psychiatrictimes.com/view/gender-culture-and-social-constructs-in-body-focused-repetitive-behaviors">we are and our social status</a>. You could say, they separate the caveman from businessman.</p> <p>It was no surprise then that many of us found a new level of appreciation for our hairdressers and nail artists during the COVID lockdowns. Even Taylor Swift reported <a href="https://abcnews.go.com/GMA/Culture/taylor-swift-reveals-shes-cutting-hair-covid-19/story?id=74757540&amp;t">she cut her own hair during lockdown</a>.</p> <p>So, what would happen if all this hair and nail grooming got too much for us and we decided to give it all up. Would our hair and nails just keep on growing?</p> <p>The answer is yes. The hair on our head grows, on average, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9917549/">1 centimeter per month</a>, while our fingernails grow an average of just <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC11436330/">over 3 millimetres</a>.</p> <p>When left unchecked, our hair and nails can grow to impressive lengths. Aliia Nasyrova, known as the Ukrainian Rapunzel, holds the world record for the longest locks on a living woman, which measure an <a href="https://www.youtube.com/watch?v=1TdlEIQdVwo&amp;t=81s">impressive 257.33 cm</a>.</p> <p>When it comes to record-breaking fingernails, Diana Armstrong from the United States holds that record <a href="https://www.youtube.com/watch?v=nwql937j-7Q">at 1,306.58 cm</a>.</p> <p>Most of us, however, get regular haircuts and trim our nails – some with greater frequency than others. So why do some people’s hair and nails grow more quickly?</p> <h2>Remind me, what are they made out of?</h2> <p>Hair and nails are made mostly from keratin. Both grow from matrix cells below the skin and grow through different patterns of cell division.</p> <p>Nails grow steadily from the matrix cells, which sit under the skin at the base of the nail. These cells divide, pushing the older cells forward. As they grow, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5383514/">the new cells slide</a> along the nail bed – the flat area under the fingernail which looks pink because of its rich blood supply.</p> <p>A hair also starts growing from the matrix cells, eventually forming the visible part of the hair – the shaft. The hair shaft grows from a root that sits under the skin and is wrapped in a sac known as the hair follicle.</p> <p>This sac has a nerve supply (which is why it hurts to pull out a hair), oil-producing glands that lubricate the hair and a tiny muscle that <a href="https://www.ncbi.nlm.nih.gov/books/NBK546248/">makes your hair stand up</a> when it’s cold.</p> <p>At the follicle’s base is the hair bulb, which contains the all-important hair papilla that supplies blood to the follicle.</p> <p>Matrix cells near the papilla divide to produce new hair cells, which then harden and form the hair shaft. As the new hair cells are made, the hair is pushed up above the skin <a href="https://www.jidonline.org/article/S0022-202X(15)41553-2/fulltext">and the hair grows</a>.</p> <p>But the papilla also plays an integral part in regulating hair growth cycles, as it sends signals to the stem cells to move to the base of the follicle and form a hair matrix. Matrix cells then get signals to divide and start a new growth phase.</p> <h2>Unlike nails, our hair grows in cycles</h2> <p>Scientists have identified <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9917549/">four phases of hair growth</a>, the:</p> <ol> <li> <p>anagen or growth phase, which lasts between two and eight years</p> </li> <li> <p>catagen or transition phase, when growth slows down, lasting around two weeks</p> </li> <li> <p>telogen or resting phase, when there is no growth at all. This usually lasts two to three months</p> </li> <li> <p>exogen or shedding phase, when the hair falls out and is replaced by the new hair growing from the same follicle. This starts the process all over again.</p> </li> </ol> <figure class="align-center "><img src="https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=308&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=308&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=308&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=387&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=387&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/637402/original/file-20241210-15-gtv259.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=387&amp;fit=crop&amp;dpr=3 2262w" alt="Stages of hair growth graphic" /><figcaption><span class="caption">Hair follicles enter these phases at different times so we’re not left bald.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-vector/stages-hair-growth-cycle-vector-isolated-2433656865">Mosterpiece/Shutterstock</a></span></figcaption></figure> <p>Each follicle goes through this cycle <a href="https://www.longdom.org/open-access/a-note-on-the-human-hair-follicle-from-the-origin-to-the-death-93871.html?t">10–30 times in its lifespan</a>.</p> <p>If all of our hair follicles grew at the same rate and entered the same phases simultaneously, there would be times when we would all be bald. That doesn’t usually happen: at any given time, only one in ten hairs is in the resting phase.</p> <p>While we lose about <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9917549/">100–150 hairs daily</a>, the average person has <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9917549/">100,000 hairs</a> on their head, so we barely notice this natural shedding.</p> <h2>So what affects the speed of growth?</h2> <p>Genetics is the most significant factor. While hair growth rates vary between individuals, they tend to be <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4201279/">consistent among family members</a>.</p> <p>Nails are also influenced by genetics, as siblings, especially identical twins, tend to have <a href="https://link.springer.com/referenceworkentry/10.1007/978-3-319-26594-0_121-1">similar nail growth rates</a>.</p> <p>But there are also other influences.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9917549/">Age makes a difference</a> to hair and <a href="https://link.springer.com/referenceworkentry/10.1007/978-3-319-26594-0_121-1">nail</a> growth, even in healthy people. Younger people generally have faster growth rates because of the slowing metabolism and cell division that comes with ageing.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7432488/">Hormonal changes</a> can have an impact. Pregnancy often <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7432488/">accelerates</a> hair and nail growth rates, while menopause and high levels of the stress hormone cortisol can <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7432488/">slow growth rates</a>.</p> <p>Nutrition also changes <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6380979/">hair</a> and <a href="https://ijdvl.com/nails-in-nutritional-deficiencies/?t">nail</a> strength and growth rate. While hair and nails are made mostly of keratin, they also contain water, fats and various minerals. As hair and nails keep growing, these minerals need to be replaced.</p> <p>That’s why a balanced diet that includes sufficient nutrients to support your hair and nails is essential for maintaining their health.</p> <p>Nutrient deficiencies may contribute to hair loss and nail breakage by disrupting their growth cycle or weakening their structure. Iron and zinc deficiencies, for example, have both been linked to <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6380979/">hair loss</a> and <a href="https://ijdvl.com/nails-in-nutritional-deficiencies/?t">brittle nails</a>.</p> <p>This may explain why thick hair and strong, well-groomed nails have long been associated with perception of good health and high status.</p> <p>However, not all perceptions are true.</p> <h2>No, hair and nails don’t grow after death</h2> <p>A persistent myth that may relate to <a href="https://www.britannica.com/topic/vampire">the legends of vampires</a> is that hair and nails continue to grow after we die.</p> <p>In reality, they only <em>appear</em> to do so. As the body dehydrates after death, the skin shrinks, making hair and nails <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2151163/">seem longer</a>.</p> <p>Morticians are well aware of this phenomenon and some <a href="https://www.adomonline.com/mortuary-man-reveals-how-he-handles-nails-of-the-dead/?t">inject tissue filler</a> into the deceased’s fingertips to minimise this effect.</p> <p>So, it seems that living or dead, there is no escape from the never-ending task of caring for our hair and nails.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241556/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/michelle-moscova-310728">Michelle Moscova</a>, Adjunct Associate Professor, Anatomy, <a href="https://theconversation.com/institutions/unsw-sydney-1414">UNSW Sydney</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/why-do-some-peoples-hair-and-nails-grow-quicker-than-mine-241556">original article</a>.</em></p>

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Do natural fabrics really keep us cooler in summer? Here’s the science

<p><em><a href="https://theconversation.com/profiles/nisa-salim-1442233">Nisa Salim</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p>The Bureau of Meteorology has warned Australia is facing one of the <a href="https://www.abc.net.au/news/2024-10-12/australia-facing-one-of-hottest-summers-on-record-bom/104464014">hottest summers on record</a>. As the weather warms, many of us reach for light-coloured clothes in natural fabrics, such as cotton and linen.</p> <p>But why are natural fabrics like these so much better at keeping us cool when the weather is hot?</p> <p>Here’s what the science says.</p> <h2>Natural fabrics and sweat: a match made in heaven</h2> <p>In hot weather, we sweat. As sweat evaporates, it carries heat away, which helps cool the body down.</p> <p>In hot weather, then, we want clothes that help take moisture away from the body as efficiently as possible.</p> <p>Natural fabrics are made using fibres extracted from plant- or animal-based sources such as cotton, linen, hemp, wool and silk.</p> <p>The primary component of all plant-based fibres is cellulose. Animal-based fibres are made up of proteins such as keratin and silk fibroin.</p> <p>Cellulose molecules are rich in compounds called hydroxyl groups that attract water and moisture. In scientific terms, they are hydrophilic – they love water.</p> <p>So, clothing made of cotton and linen is highly hydrophilic. It tends to absorb moisture and disperse it across the fabric, allowing it to evaporate more easily.</p> <p>This takes the sweat away quickly, making it more comfortable and breathable and allowing us to stay cool in sweltering temperatures.</p> <p>One downside of the natural fabrics is they wrinkle quickly (some people, of course, like that look).</p> <p>And on a really hot, sweaty day, natural fabrics can get heavy and wet.</p> <p>Animal fibres are basically proteins, and their properties vary depending on the source.</p> <p>Wool has been bio-engineered over millions of years to be comfortable to wear. Wool fibres are hydrophilic on the inside and hydrophobic on the outside, meaning they’re both water resistant and good at wicking moisture away.</p> <p>On the other hand, silk fabrics are very good at helping regulate temperature; they keep us cool in hot weather and warm in cold weather.</p> <h2>Synthetic fabrics: less wrinkly, more sweaty</h2> <p>Synthetic fabrics, on the other hand, are lighter and tend to wrinkle less.</p> <p>Common synthetic fabrics (such as polyester, nylon and acrylic) are all made from petroleum-based chemicals.</p> <p>Most synthetic fibres are made of long chains of hydrogen and carbon atoms and do not contain the hydroxyl groups we discussed earlier.</p> <p>Such fibres are therefore hydrophobic – they hate water. This means the water can’t spread evenly across the fabric and evaporate easily.</p> <p>They trap sweat against the skin, making the clothes less breathable and comfortable when the weather is warm and humid.</p> <p>However, some synthetic fabrics used in certain types of active wear can wick sweat away from body.</p> <p>And some semi-synthetic fabrics such as rayon or tencel (which are made from wood pulp or cotton with synthetic fibres) are more breathable than other synthetic fabrics such as polyester or nylon.</p> <h2>Fabric weave makes a difference, too</h2> <p>The colour of the clothing is also a contributing factor to keep you cool during summer. Light colours reflect sunlight away from you and help to keep the body cooler.</p> <p>There is some evidence dark colours absorb the <a href="https://www.sciencedirect.com/science/article/pii/S2214157X23012054">sunlight and associated heat</a>, making the surface of the skin warmer than normal.</p> <p>Another factor affecting breathability and comfort of clothing is the way the fabrics are woven.</p> <p>Fabrics that are loosely woven (sometimes known as “open weave”) with thinner materials naturally have more airflow, which helps you keep cool.</p> <p>For a quick, non-scientific test, hold a fabric up and see how much light passes through it. The more light you can see, the more breathable it likely is.</p> <p>The way the fabric is treated can play a role, too; such as for softening and wrinkle resistance.</p> <p>Using a fabric softener when you do a load of laundry usually doesn’t affect fabric breathability; softeners modify the surface of the fabric but don’t change the internal structure or porous nature of the fabrics.</p> <p>Wrinkle resistance is the ability of the fabric to stay smooth and polished even after washing. Synthetic fabrics are inherently wrinkle resistant. Natural fibres are more prone to wrinkles but can be chemically treated on the fabric surface during manufacturing to make them wrinkle resistant.</p> <p>Such treatments, however, may form layers on top of the fabric blocking the airflow, leading them to be less breathable.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/240909/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/nisa-salim-1442233">Nisa Salim</a>, Senior Lecturer at the School of Engineering, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/do-natural-fabrics-really-keep-us-cooler-in-summer-heres-the-science-240909">original article</a>.</em></p>

Beauty & Style

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Why does grass make my skin itch?

<p><em><a href="https://theconversation.com/profiles/deryn-lee-thompson-1449312">Deryn Lee Thompson</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>So, you’ve enjoyed a picnic in the sunshine. Or you’ve sat on the grass for a twilight concert. But you’ve come away with itchy and scratchy skin.</p> <p>Could you have an allergy to grass? Or is something else going on?</p> <h2>Grass has tiny hairs</h2> <p>One possible reason we get a rash is the physical structure of grass itself.</p> <p><a href="https://bmcplantbiol.biomedcentral.com/articles/10.1186/s12870-021-02840-x">Blades of grass</a> are covered in tiny “hairs” (called trichomes), which you can view under a microscope.</p> <p>These help protect the grass from being eaten by insects or animals, damaged by ultraviolet rays or losing too much water.</p> <p>Trichomes can also cause tiny scratches to the skin and the skin reacts by becoming red and may feel itchy.</p> <p>Some species of grass are also firmer or stiffer so may feel more “scratchy” when people sit on them.</p> <p>Skin is a complex organ and is linked to the immune system. When irritated, the skin and immune system recognise something is happening and release complex chemicals that can <a href="https://www.jacionline.org/article/S0091-6749%2815%2900575-8/fulltext">cause redness and itching</a>.</p> <p>People with dry, red, itchy skin conditions often find their skin is extra sensitive to grass and other irritants like fertilisers or sprays. For example, if you have eczema (also called dermatitis) your skin looks and feels dry, as your <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5849435/">skin barrier is damaged</a>.</p> <h2>Could it be an allergy?</h2> <p>Grass allergy involves <a href="https://www.allergy.org.au/patients/allergic-rhinitis-hay-fever-and-sinusitis/pollen-allergy">aero-allergens</a>, that is, the grass pollen in the air. Symptoms include runny or a stuffy nose, itchy nose and eyes and even itchy ears.</p> <p>If you have these symptoms allergy specialists <a href="https://www.allergy.org.au/patients/allergy-testing/allergy-testing">may perform a skin prick test</a> to identify particular aero-allergen triggers.</p> <p>After the allergist takes your detailed history, drops of various allergens are placed on the forearm, along with a positive and negative control. A sterile lancet pricks the skin through the drop. After 15 minutes the test is read, with positive reactions showing a “wheal and flare” response (a lump like a mosquito bite and redness). The allergist then interprets the findings.</p> <p>But, in the absence of hay fever-like symptoms, dermatologists may perform <a href="https://dermnetnz.org/topics/patch-tests">allergy patch testing</a> to investigate contact allergies (dermatitis) to specific plants, for example <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9542089/"><em>Compositae</em></a>.</p> <p>In a patch test the dermatologist places a series of small chambers (or sticky dots) on the back, each one containing a different potential allergen. The test takes several days to produce results. If a reaction develops under a test chamber, the dermatologist may confirm allergic contact dermatitis.</p> <p>But definitive results are tricky as these two allergy tests can’t tell you if your rash is from physical irritation – such as the tiny scratches – rather than an allergy.</p> <h2>How can I avoid it?</h2> <p>The best way to reduce physical irritation problems with grass it to limit contact. This could involve simple things like wearing long sleeves or pants, or sitting on a rug or towel.</p> <p>Many Australians do have dry skin, but do not often realise how dry it is. So, applying a <a href="https://toolkit.eczemasupport.org.au/my-self/moisturising-creams/">basic thick moisturiser</a> to the face and body skin can help place a barrier between the grass and the skin. Sunscreen is also recommended when outdoors.</p> <p>For people who have dry, red or itchy skin conditions or those who experience itchiness when sitting on the grass, taking <a href="https://allergyfacts.org.au/allergy-treatments-antihistamine/">antihistamines</a> a minimum of 30 minutes before you sit on the grass may help lessen the itchiness.</p> <h2>How can I calm my skin?</h2> <p>If you do develop a an irritant rash, here are a few tips. You could try</p> <ul> <li> <p>taking an <a href="https://allergyfacts.org.au/allergy-treatments-antihistamine/">antihistamine</a></p> </li> <li> <p>rinsing skin with tepid water</p> </li> <li> <p>washing off the potential irritants with a non-soap-based bland body cleanser <a href="https://toolkit.eczemasupport.org.au/my-self/bathing-showering-and-washing-clothes/">can be helpful</a>. Then, re-apply a layer of thick, bland, fragrance-free moisturiser.</p> </li> </ul> <p>If none of these measures help, see a pharmacist for advice on using an appropriate strength cortisone cream which may <a href="https://www.healthdirect.gov.au/rashes">help reduce</a> the symptoms.</p> <p>Be aware of more serious signs of an <a href="https://www.allergy.org.au/patients/about-allergy/anaphylaxis">allergic reaction</a>. If in addition to red bumps and itchiness, other symptoms such as shortness of breath, cough, wheeze, chest tightness or facial swellings develop while sitting on the grass, people may need urgent medical care.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/243046/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/deryn-lee-thompson-1449312">Deryn Lee Thompson</a>, Lecturer in Nursing, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/why-does-grass-make-my-skin-itch-243046">original article</a>.</em></p>

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Readers response: What are some things older generations did as couples that we rarely see today?

<p>We asked our readers what simple acts of romance they encountered in their lives, that younger generations don't partake in anymore, and the response was overwhelming. Here's what they said. </p> <p><strong>Sharon Watson</strong> - Men would walk on the outside of the lady on the road. Also, walking hand in hand and doors &amp; car doors were opened by men for women.</p> <p><strong>Jo Hoffman</strong> - Went to cabarets for old time ballroom dancing to beautiful music!</p> <p><strong>Ann MacCann</strong> - Taking walks holding hands.</p> <p><strong>Judith Turpin</strong> - Ate breakfast and evening meal at the table as family. We communicated!</p> <p><strong>Margaret Gerlach</strong> - Visited family and in-laws every week.</p> <p><strong>Lorna Johnson</strong> - Gentlemen tipped their hats at ladies and held the door open for you.</p> <p><strong>Jan Bradley</strong> - Dancing at the town hall, drive in movies, stayed together.</p> <p><strong>Jane Reynolds</strong> - Spending time together as a family, playing games, talking to each other. No phones, writing and receiving letters, supporting each other, staying together, caring and helping each other.</p> <p><strong>Myfawny Jones</strong> - One partner read the road map while the other drived, often on corrugated gravel roads.</p> <p><strong>Lindi Williams</strong> - Played cards together.</p> <p><strong>Cherylyn Thornton</strong> - Went to the drive in movies.</p> <p><strong>Patricia Sutton</strong> - We had children because we wanted them, not because of the economy or that we couldn't afford them!</p> <p><strong>Di Richardson</strong> - Shotgun marriages!</p> <p><em>Image credits: Shutterstock </em></p>

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"I’ve lost my eyesight": Sir Elton John's sad health update

<p>Sir Elton John has revealed that he had "lost his eyesight" at the premiere of his new musical. </p> <p>The singer, 77, attended the opening night of <em>The Devil Wears Prada</em> in London on Sunday and told the audience that he has lost his eyesight. </p> <p>“As some of you may know, I have had issues and now I have lost my sight," he began.</p> <p>“I haven’t been able to see the performance but I have enjoyed it.</p> <p>“To my husband who’s been my rock because I haven’t been able to come to many of the previews because, as you know, I have lost my eyesight".</p> <p>"So it's hard for me to see it, but I love to hear it and, boy, it sounded good tonight," he said.</p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-captioned="" data-instgrm-permalink="https://www.instagram.com/p/DDDXN04iPc1/?utm_source=ig_embed&utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/p/DDDXN04iPc1/?utm_source=ig_embed&utm_campaign=loading" target="_blank" rel="noopener">A post shared by Elton John (@eltonjohn)</a></p> </div> </blockquote> <p>The singer-songwriter wrote the music for the highly-anticipated new musical which premiered in London's West End on Sunday night. </p> <p>He previously opened up about his condition in September, after he contracted an infection in his right eye that had left him "with only limited vision in one eye."</p> <p>“It’s been four months now since I haven’t been able to see. My left eye is not the greatest," he told <em>Good Morning America</em>. </p> <p>“It’s been a while since I’ve done anything. I just have to get off my backside.”</p> <p>The superstar admitted that his loss of vision had really rattled him, saying: “It kind of floored me, and I can’t see anything. I can’t read anything, I can’t watch anything." </p> <p>“There’s hope and encouragement that it will be okay. But I’m kind of stuck in the moment, going into the studio and recording, I don’t know. Because I can’t see a lyric for start.”</p> <p>Sunday's premiere of the musical was also a charity gala event for the Elton John AIDS Foundation, which was attended by celebrities and fashion-industry figures including Donatella Versace and former <em>Vogue</em> editor Anna Wintour.</p> <p><em>Images: Instagram</em></p>

Caring

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There are 2 main ways to stretch – the one you should choose depends on what you want your body to do

<p><em><a href="https://theconversation.com/profiles/hunter-bennett-1053061">Hunter Bennett</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/lewis-ingram-1427671">Lewis Ingram</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>Picture this: you’ve just woken up and rolled out of bed. Your feet hit the floor, and your legs buckle. They are in absolute agony – that run yesterday has really come back to haunt you.</p> <p>And then you remember you forgot to stretch before and after your run. Surely that’s the reason you’re so sore today. Or is it?</p> <p>We’ve all heard about the importance of stretching before and after exercise. But does it really make a difference? Here’s what the science says.</p> <h2>What is stretching?</h2> <p>There are many different types of stretching, but the two most common are <a href="https://pubmed.ncbi.nlm.nih.gov/22319684">static and dynamic stretching</a>.</p> <p>Static stretching involves moving a muscle (or muscles) into a lengthened position and holding this for a <a href="https://pubmed.ncbi.nlm.nih.gov/15292749/">short period of time</a> – often anywhere between 15 and 90 seconds.</p> <p>A common example of this would be keeping your heels on the ground while leaning forward to touch the ground with a straight knee to stretch your hamstring muscles.</p> <p>Meanwhile, <a href="https://pubmed.ncbi.nlm.nih.gov/21373870/">dynamic stretching</a> involves actively moving your muscles and joints back and forth through their available range of motion.</p> <p>Common examples include swinging your legs back and forth, from side to side, or swinging your arms in circles.</p> <h2>Stretching before exercise</h2> <p>The main reasons people stretch before exercise are to increase flexibility, improve performance, and reduce the risk of injury.</p> <p>While we know stretching <a href="https://pubmed.ncbi.nlm.nih.gov/29223884/">increases flexibility</a>, its effect on <a href="https://pubmed.ncbi.nlm.nih.gov/17909411/">performance</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/18027995/">injury</a> is less clear. But let’s look at what the evidence says for each one.</p> <p><strong>Flexibility</strong></p> <p>Both static and dynamic stretching increase flexibility, although static stretching seems to have a <a href="https://www.sciencedirect.com/science/article/pii/S2095254623000571">slightly larger effect</a>.</p> <p>Short-term static stretching inhibits your <a href="https://www.healthline.com/health/why-does-stretching-feel-good#:%7E:text=Research%20has%20shown%20that%20static,of%20your%20sympathetic%20nervous%20system.">sympathetic nervous system</a> (your fight or flight system), which reduces the stiffness of your <a href="https://www.sciencedirect.com/science/article/pii/S2095254624000693#bib0010">muscles and tendons</a>. This makes you more flexible straight after stretching.</p> <p>In the long term, static stretching is thought to make you more flexible by increasing the length of <a href="https://pubmed.ncbi.nlm.nih.gov/37318696/">your muscles and tendons</a> or by simply making you <a href="https://pubmed.ncbi.nlm.nih.gov/28801950/">more tolerant to the discomfort caused by stretching</a>.</p> <p><strong>Performance</strong></p> <p>When it comes to improving performance, this will depend on the type of physical activity you’re doing.</p> <p>If you are about to move your body through large ranges of motion – something like gymnastics or dancing – then the improvements in flexibility following stretching will likely result in better performance.</p> <p>On the flip side, research has shown static stretching may <a href="https://pubmed.ncbi.nlm.nih.gov/26642915/">impair performance</a> by up to 5% in activities that rely on maximum strength and power, such as shotput and powerlifting.</p> <p>This might be because of the reduced nervous system activation we mentioned earlier, making it more challenging for your muscles to produce force.</p> <p>However, significant impairments only seem to occur when stretching for <a href="https://pubmed.ncbi.nlm.nih.gov/26642915/">more than 60 seconds</a>. Stretching for less than 60 seconds appears to impact performance minimally (by around 1%).</p> <p>On the other hand, dynamic stretching increases <a href="https://pubmed.ncbi.nlm.nih.gov/12762825">muscle temperature</a> and the speed at which your nerves <a href="https://cdnsciencepub.com/doi/10.1139/apnm-2015-0235">send messages to your muscles</a>, which might improve muscle performance.</p> <p>Dynamic stretching has been shown to <a href="https://bmcsportsscimedrehabil.biomedcentral.com/articles/10.1186/s13102-023-00703-6">enhance strength and power by a small amount</a>. This might make it a better option before activities that are performed explosively, such as sprinting, jumping, lifting weights or playing team sport.</p> <p><strong>Injury and soreness</strong></p> <p>When it comes to reducing injury, whether stretching before exercise is beneficial remains unclear.</p> <p>Many studies have shown stretching <a href="https://pubmed.ncbi.nlm.nih.gov/24100287/">doesn’t have an effect</a>. But a lot of these look at the effect of stretching on all types of injuries, which might not show its true effect.</p> <p>For example, a broken arm from a tackle would be grouped with a calf strain, but it seems logical that stretching is more likely to reduce the risk of the calf muscle strain than the broken arm.</p> <p>A <a href="https://link.springer.com/article/10.1007/s11332-024-01213-9">recent review</a> did explore the effect of stretching on different types of injuries and found static stretching may reduce the risk of muscle, but not tendon, injuries. To date, there’s no evidence to suggest stretching would reduce the risk of broken bones and contact injuries.</p> <p>There’s very little research exploring whether dynamic stretching alone can reduce injury risk. <a href="https://link.springer.com/article/10.1007/s40279-023-01847-8">One study</a> showed dynamic stretching can improve joint stability, which might reduce the risk of joint injuries (such as ankle sprains). But more research is needed to make any conclusions with confidence.</p> <p>Many people also stretch before exercise to help prevent muscle soreness after exercise. However, <a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004577.pub3/full">research has shown</a> stretching before exercise has no meaningful impact on muscle soreness after exercise.</p> <h2>Stretching after exercise</h2> <p>The main reason people stretch after exercise is to improve recovery and reduce muscle soreness. The most common approach is static stretching.</p> <p>However, like stretching before exercise, research doesn’t indicate stretching after exercise reduces <a href="https://pubmed.ncbi.nlm.nih.gov/27447321/">muscle damage or soreness</a>.</p> <p>It has also been suggested <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4831894/">really intense stretching can damage your muscles</a>, which might even make muscle soreness worse. But this isn’t a consistent finding, and may only happen to certain people.</p> <p>However, stretching does <a href="https://pubmed.ncbi.nlm.nih.gov/21386722/">promote relaxation</a>. So gentle stretching could be a nice way to wind down after an intense exercise session.</p> <h2>So, what should you do?</h2> <p>Maybe a lack of stretching isn’t the reason you were sore after you run after all. Your legs are probably aching because you simply ran further, or harder, than you normally do.</p> <p>But that doesn’t mean you shouldn’t stretch.</p> <p>The available evidence suggests doing some dynamic stretching before exercise will increase flexibility and improve your performance, whether you’re planning to go for a run, play a team sport, or lift weights.</p> <p>Static stretching can be great if you want to increase your flexibility, just don’t do it right before intense exercise. And after exercise, some gentle static stretching can help transition the body to a more relaxed state.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244048/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/hunter-bennett-1053061">Hunter Bennett</a>, Lecturer in Exercise Science, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/lewis-ingram-1427671">Lewis Ingram</a>, Lecturer in Physiotherapy, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/there-are-2-main-ways-to-stretch-the-one-you-should-choose-depends-on-what-you-want-your-body-to-do-244048">original article</a>.</em></p>

Body

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Ant stings can be painful. Here’s how to avoid getting stung this summer (and what to do if you do)

<p><em><a href="https://theconversation.com/profiles/sam-robinson-2237268">Sam Robinson</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>With the start of summer just days away, many of us will be looking forward to long sunny days spent at the beach, by the pool, out camping or picnicking in the park.</p> <p>Insects also love summer. This is when most of them <a href="https://www.australiangeographic.com.au/topics/science-environment/2016/12/experts-predict-increased-insect-activity-this-summer/">breed and feed</a>. But this shared appreciation of the season can sometimes lead to conflict.</p> <p>Insects have long been prey to many species, including birds, mammals, amphibians and other insects. As such, they’ve evolved a diverse range of defences – perhaps none more familiar to humans than the sting.</p> <p>Many ants have a sting at their rear end which they use to deliver venom. It’s not the sting itself that causes pain, but rather <a href="https://www.nature.com/articles/s41467-023-38839-1">the venom</a>. Ant venom contains a cocktail of different chemicals, some of which have evolved specifically to manipulate nerve endings in our skin to cause pain.</p> <p>Let’s look at some of the different ant stings you might experience this summer in Australia, and how to respond.</p> <h2>Bull ants</h2> <p>Bull ants (also known as bulldog ants, jumper ants, or jack jumpers) are large, for an ant. Some species can reach a length of <a href="https://en.wikipedia.org/wiki/Myrmecia_(ant)#:%7E:text=Each%20of%20their%20eyes%20contains,mm%20(1.5%20in)%3B%20M.">4 centimetres</a>. They are easily recognisable with their large eyes, long mandibles (jaws) and aggressive nature.</p> <p>Their sting is immediate, hot, sharp, and unmistakable, not dissimilar to that of a honeybee. The intense pain will last only a few minutes, before it’s replaced by some redness and swelling around the sting site.</p> <h2>Green-head ants</h2> <p>Green-head ants are also called green ants (but not to be confused with the <a href="https://en.wikipedia.org/wiki/Oecophylla_smaragdina">green tree ants</a> of northern Australia which do not sting). Green-head ants are common, and love our grass lawns.</p> <p>At around <a href="https://en.wikipedia.org/wiki/Green-head_ant">6 millimetres long</a>, they are significantly smaller than bull ants. They can be recognised by their shiny green and purple exoskeleton.</p> <p>Green-head ants tend to be less aggressive than bull ants, but they can still deliver a meaningful sting. The pain of a green-head ant’s sting can build more gradually, and create an intense, sticky ache.</p> <h2>Fire ants</h2> <p>Fire ants (or red imported fire ants) are originally from South America. They were first detected <a href="https://www.fireants.org.au/stop/how-fire-ants-arrived-in-australia">in Brisbane in 2001</a>, thought to have hitched a ride in shipping containers, and have since spread across south-east Queensland.</p> <p>Fire ants are reddish-brown and black and range in size from <a href="https://www.fireants.org.au/look/appearance">2–6 millimetres long</a>.</p> <p>You’re most likely to encounter fire ants at their nests, which look like a pile of powdery soil. A fire ant nest doesn’t have an obvious entry, which is a good way to distinguish them from other similar ant nests.</p> <p>Disturbing a fire ant nest will awaken an angry mass of hundreds of ants and put you at risk of being stung.</p> <p>The initial pain from an individual sting is like an intense, hot itch, though manageable. But fire ant stings rarely occur in single digits. One ant can sting multiple times, and multiple ants can sting one person, which can lead to <a href="https://theconversation.com/fire-ants-are-on-the-march-heres-what-happens-when-they-sting-218908">hundreds of stings</a>. Fire ant stings can lead to pus-filled ulcers and scarring in the days afterwards.</p> <p>If you live in an area where there are fire ants, it’s worth taking a few minutes to educate yourself on how to <a href="https://www.fireants.org.au/look">recognise and report</a> them.</p> <h2>Electric ants</h2> <p><a href="https://www.antwiki.org/wiki/Wasmannia_auropunctata">Electric ants</a> are another nasty accidental import, originally from Central and South America. Currently restricted to <a href="https://www.outbreak.gov.au/current-outbreaks/electric-ants">Cairns and surrounds</a>, these are tiny (1.5 millimetres long) yellow ants.</p> <p>Like fire ants, these ants will typically defend <em>en masse</em>, so many will sting at once. Their sting is more painful than you’d expect from such a tiny creature. I liken it to being showered in red hot sparks.</p> <p>If you think you see electric ants, you should report this to <a href="https://www.business.qld.gov.au/industries/farms-fishing-forestry/agriculture/biosecurity/animals/invasive/restricted/electric-ant">Biosecurity Queensland</a>.</p> <h2>Aussie ants aren’t the worst</h2> <p>You might be surprised to hear Australian ants don’t even make the podium for the most painful ant stings. Among the prize winners are <a href="https://www.press.jhu.edu/books/title/10878/sting-wild">harvester ants</a> (North and South America) which cause an extreme, sticky ache, likened to a drill slowly turning in your muscle – for as long as 12 hours.</p> <p>The gold medal goes to the sting of the bullet ant of South and Central America, which <a href="https://www.press.jhu.edu/books/title/10878/sting-wild">has been described</a> as:</p> <blockquote> <p>Pure, intense, brilliant pain. Like walking over flaming charcoal with a 3-inch nail embedded in your heel.</p> </blockquote> <h2>How to avoid getting stung (and what to do if you do)</h2> <p>Fortunately, the solution is usually very simple. Look before you sit on the ground or lay out your picnic blanket, avoiding areas where you see ant nests or lots of foraging ants.</p> <p>Choice of footwear can also be important. In my experience, perhaps unsurprisingly, most stings occur on thong-wearing feet.</p> <p>If you do get stung, in most cases it’s going to get better on its own. Pain will usually subside after a few minutes (sometimes a little longer for a green-head ant sting). The redness, swelling and itch that typically follow can last for a few days.</p> <p>In the meantime, if needed, <a href="https://www.healthdirect.gov.au/insect-bites-and-stings">an ice pack</a> will help with the pain. If it’s particularly bad, a local anaesthetic cream containing lidocaine may offer some temporary relief. You can get this over the counter at the pharmacy.</p> <p>A small proportion of people may have an allergic reaction to ant stings. In very severe cases this might involve <a href="https://www.healthdirect.gov.au/insect-bites-and-stings#anaphylaxis">trouble breathing</a> or swallowing. If you or someone you’re with experiences these symptoms after an ant sting, seek urgent medical attention.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241582/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/sam-robinson-2237268">Sam Robinson</a>, Senior Research Fellow, Institute for Molecular Bioscience, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/ant-stings-can-be-painful-heres-how-to-avoid-getting-stung-this-summer-and-what-to-do-if-you-do-241582">original article</a>.</em></p>

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Readers response: What's one thing you must do when visiting Australia?

<p>We asked our readers what travellers shouldn't miss when they head to Australia. Here's what they said.</p> <p><strong>Jim Bell</strong> - The one thing you must do is to take a couple months there. We were there for 3 weeks and it wasn't nearly long enough to see and do everything we wanted to.</p> <p><strong>Lorraine James</strong> - Land in Brisbane and take a cruise ship to Tasmania. Princess does a cruise stopping in Sydney, Bega, a country town on the coast and then of course Port Arthur old penal settlement then Hobart ,Tasmania. Get a taste of Australia.</p> <p><strong>Deedee Cullum</strong> - If you’re in a major city then catch a train for the day. Eg, Sydney to Blue Mountains or Melbourne to Dandenongs. That way you’ll see some bush without the bother of driving.</p> <p><strong>Anne Hare</strong> - Go see Uluru in the Northern Territory. It's a long way from the coast but it will astound you.</p> <p><strong>Suzanne Maree Saxelby</strong> - Remember to visit the outback. It has a beauty that the coastline doesn't have.</p> <p><strong>Janette Mitchell</strong> - Take the XPT train from Sydney to Coffs Harbour. So much beautiful scenery &amp; Coffs Harbour is a great place to stay.</p> <p><strong>Mattie Smith</strong> - Don't just stick to the coast! Australia has so much to offer. </p> <p><strong>Avis Tolcher</strong> - Visit the Whitsundays. So beautiful.</p> <p><strong>Judith Turpin</strong> - Wander through the Daintree on foot. Swim in a deep fresh water hole. Take your children on a guided night walk through the forest. Magic!</p> <p><em>Image credits: Shutterstock </em></p>

Domestic Travel

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Sir Bob Geldof reveals new version of iconic Christmas song

<p>Sir Bob Geldof has shared the details of the 2024 reprise of the iconic song <em>Do They Know It's Christmas?</em>, revealing why the new version of the song will be the last. </p> <p><em>Do They Know It's Christmas?</em> was first released in 1984, and was sparked by Bob Geldof being disturbed by a news report on the famine in Ethiopia. </p> <p>He enlisted big names such as Bono, Boy George, Sting and George Michael to join in on the song to raise awareness and money for the famine.</p> <p>"I was sickened by it. I mean, that is really it," Geldof told <em>A Current Affair</em>.</p> <p>"I sat down and turned on the TV, and here was this devastating thing that put, you know, my pathetic, puny personal problems in a horrifying perspective."</p> <p>Since then, three more versions of the charity song have been made, in 2004, 2014 and now, in 2024 to mark the 40th anniversary of the original track. </p> <p><iframe title="YouTube video player" src="https://www.youtube.com/embed/CDiYk07FG1Y?si=TwdiduKB5vPX56V7" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe></p> <p>Instead of recruiting new artists, this time Bob Geldof has remixed famous renditions from previous versions to combine the greatest voices of our time.</p> <p>Despite each iteration of the song having its own unique charm and voice, Geldof says it will be the last hurrah for the iconic Christmas tune.</p> <p>"I personally think, it's the definitive one and there will be no more," Geldof said.</p> <p>"The world has never been more fragile in my life, and I'm old, and I don't think people can take on board any more horror. They cannot absorb any more, but it's happening."</p> <p><em>Image credits: A Current Affair </em></p>

Music

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7 things you can do if you think you sweat too much

<p><em><a href="https://theconversation.com/profiles/michael-freeman-223922">Michael Freeman</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p>Sweating is our body’s way of cooling down, a bit like an internal air conditioner.</p> <p>When our core temperature rises (because it’s hot outside, or you’re exercising), sweat glands all over our skin release a watery fluid. As that fluid evaporates, it takes heat with it, keeping us from overheating.</p> <p>But sweating can vary from person to person. Some people might just get a little dewy under the arms, others feel like they could fill a swimming pool (maybe not that dramatic, but you get the idea).</p> <p>So what’s a normal amount of sweat? And what’s too much?</p> <h2>Why do some people sweat more than others?</h2> <p>How much you sweat depends on a number of <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">factors</a> including:</p> <ul> <li> <p>your age (young kids generally sweat less than adults)</p> </li> <li> <p>your sex (men tend to sweat more than women)</p> </li> <li> <p>how active you are.</p> </li> </ul> <p>The average person sweats at the rate of <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">300 millilitres per hour</a> (at 30°C and about 40% humidity). But as you can’t go around measuring the volume of your own sweat (or weighing it), doctors use another measure to gauge the impact of sweating.</p> <p>They ask whether sweating interferes with your daily life. Maybe you stop wearing certain clothes because of the sweat stains, or feel embarrassed so don’t go to social events or work.</p> <p>If so, this is a medical condition called <a href="https://www.dermcoll.edu.au/atoz/axillary-hyperhidrosis/">hyperhidrosis</a>, which affects <a href="https://onlinelibrary.wiley.com/doi/pdf/10.1111/1346-8138.16908">millions of people</a> worldwide.</p> <p>People with this condition most commonly report problematic armpit sweating, as you’d expect. But sweaty hands, feet, scalp and groin can also be an issue.</p> <p>Hyperhidrosis can be a symptom of another medical condition, such as an <a href="https://www.frontiersin.org/articles/10.3389/fendo.2023.1167890/pdf">overactive thyroid</a>, <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">fever or menopause</a>.</p> <p>But hyperhidrosis can have no obvious cause, and the reasons behind this so-called primary hyperhidrosis are a bit of a mystery. People have normal numbers of sweat glands but researchers think they simply over-produce sweat after triggers such as stress, heat, exercise, tobacco, alcohol and hot spices. There may also be a genetic link.</p> <h2>OK, I sweat a lot. What can I do?</h2> <p><strong>1. Antiperspirants</strong></p> <p>Antiperspirants, particularly ones with <a href="https://onlinelibrary.wiley.com/doi/pdf/10.1111/ics.12852">aluminium</a>, are your first line of defence and are formulated to reduce sweating. Deodorants only stop body odour.</p> <p><a href="https://www.drugs.com/mtm/aluminum-chloride-hexahydrate-topical.html#:%7E:text=Aluminum%20chloride%20hexahydrate%20is%20an,excessive%20sweating%2C%20also%20called%20hyperhidrosis.">Aluminum chloride hexahydrate</a>, <a href="https://go.drugbank.com/drugs/DB11081">aluminium chloride</a> or the weaker <a href="https://cosmileeurope.eu/inci/detail/807/aluminum-zirconium-tetrachlorohydrex-gly/">aluminum zirconium tetrachlorohydrex glycinate</a> react with proteins in the sweat glands, forming a plug. This plug temporarily blocks the sweat ducts, reducing the amount of sweat reaching the skin’s surface.</p> <p>These products can contain <a href="https://www.termedia.pl/Journal/-7/pdf-46948-10?filename=Hyperhidrosis.pdf">up to 25%</a> aluminium. The higher the percentage the better these products work, but the more they irritate the skin.</p> <p><strong>2. Beat the heat</strong></p> <p>This might seem obvious, but staying cool can make a big difference. That’s because you have less heat to lose, so the body makes less sweat.</p> <p>Avoid super-hot, long showers (you will have more heat to loose), wear loose-fitting clothes made from breathable fabrics such as cotton (this allows any sweat you do produce to evaporate more readily), and carry a little hand fan to help your sweat evaporate.</p> <p>When exercising try <a href="https://pathprojects.com/blogs/news/how-to-make-an-ice-bandana-for-trail-running-and-hiking?srsltid=AfmBOorsJpNUDs_ZkAkJDFbDFFSeT5TtWsU4aqI4-_hHWbl_wuZLsgHn">ice bandanas</a> (ice wrapped in a scarf or cloth, then applied to the body) or wet towels. You can wear these around the neck, head, or wrists to reduce your body temperature.</p> <p>Try also to modify the time or place you exercise; try to find cool shade or air-conditioned areas when possible.</p> <p>If you have tried these first two steps and your sweating is still affecting your life, talk to your doctor. They can help you figure out the best way to manage it.</p> <p><strong>3. Medication</strong></p> <p>Some <a href="https://www.termedia.pl/Journal/-7/pdf-46948-10?filename=Hyperhidrosis.pdf">medications</a> can help regulate your sweating. Unfortunately some can also give you side effects such as a dry mouth, blurred vision, stomach pain or constipation. So talk to your doctor about what’s best for you.</p> <p>Your GP may also refer you to a dermatologist – a doctor like myself who specialises in skin conditions – who might recommend different treatments, including some of the following.</p> <p><strong>4. Botulinum toxin injections</strong></p> <p>Botulinum toxin injections are not just used for cosmetic reasons. They have many applications in medicine, including blocking the nerves that control the sweat glands. They do this for many months.</p> <p>A dermatologist usually gives the injections. But they’re only subsidised by <a href="https://www9.health.gov.au/mbs/fullDisplay.cfm?type=item&amp;q=18362&amp;qt=ItemID">Medicare</a> in Australia for the armpits and if you have primary hyperhidrosis that hasn’t been controlled by the strongest antiperspirants. These injections are given up to three times a year. It is not subsidised for other conditions, such as an overactive thyroid or for other areas such as the face or hands.</p> <p>If you don’t qualify, you can have these injections privately, but it will cost you hundreds of dollars per treatment, which can last up to six months.</p> <p><strong>5. Iontophoresis</strong></p> <p>This involves using a device that passes a weak electrical current through water to the skin to <a href="https://www.sciencedirect.com/science/article/am/pii/S254243272030014X">reducing sweating</a> in the hands, feet or armpits. Scientists aren’t sure exactly how it works.</p> <p>But this is the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9826940/">only way</a> to control sweating of the hands and feet that does not require drugs, surgery or botulinum toxin injections.</p> <p>This treatment is not subsidised by Medicare and not all dermatologists provide it. However, you can buy and use your own device, which tends to be cheaper than accessing it privately. You can ask your dermatologist if this is the right option for you.</p> <p><strong>6. Surgery</strong></p> <p>There is a procedure to cut certain nerves to the hands that stop them sweating. This is <a href="https://www.mdpi.com/2077-0383/11/3/786/pdf">highly effective</a> but can cause sweating to occur elsewhere.</p> <p>There are also other surgical options, which you can discuss with your doctor.</p> <p><strong>7. Microwave therapy</strong></p> <p>This is a <a href="https://www.tandfonline.com/doi/pdf/10.1080/09546634.2022.2089333">newer treatment</a> that zaps your sweat glands to destroy them so they can’t work any more. It’s not super common yet, and it is quite painful. It’s available privately in a few centres.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/239397/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/michael-freeman-223922"><em>Michael Freeman</em></a><em>, Associate Professor of Dermatology, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/7-things-you-can-do-if-you-think-you-sweat-too-much-239397">original article</a>.</em></p>

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Why do I get so anxious after drinking? Here’s the science behind ‘hangxiety’

<p><em><a href="https://theconversation.com/profiles/blair-aitken-1510537">Blair Aitken</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a> and <a href="https://theconversation.com/profiles/rebecca-rothman-2231560">Rebecca Rothman</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p>You had a great night out, but the next morning, anxiety hits: your heart races, and you replay every conversation from the night before in your head. This feeling, known as hangover anxiety or “<a href="https://adf.org.au/insights/what-is-hangxiety/">hangxiety</a>”, <a href="https://onlinelibrary.wiley.com/doi/10.1002/hup.2623">affects around 22%</a> of social drinkers.</p> <p>While for some people, it’s mild nerves, for others, it’s a wave of anxiety that feels impossible to ride out. The “Sunday scaries” may make you feel panicked, filled with dread and unable to relax.</p> <p>Hangover anxiety can make even simple tasks feel overwhelming. Here’s why it happens, and what you can do about it.</p> <h2>What does alcohol do to our brains?</h2> <p>A hangover is the body’s way of recovering after drinking alcohol, bringing with it a range of symptoms.</p> <p><a href="https://www.mdpi.com/2077-0383/10/23/5691">Dehydration and disrupted sleep</a> play a large part in the pounding headaches and nausea many of us know too well after a big night out. But hangovers aren’t just physical – there’s a strong mental side too.</p> <p>Alcohol is a nervous system depressant, meaning it alters how certain chemical messengers (or neurotransmitters) behave in the brain. Alcohol relaxes you by increasing <a href="https://my.clevelandclinic.org/health/articles/22857-gamma-aminobutyric-acid-gaba">gamma-aminobutyric acid</a> (GABA), the neurotransmitter that makes you feel calm and lowers inhibitions. It decreases <a href="https://my.clevelandclinic.org/health/articles/22839-glutamate">glutamate</a> and this also slows down your thoughts and helps ease you into a more relaxed state.</p> <p>Together, this interaction affects your mood, emotions and alertness. This is why when we drink, we often feel more sociable, carefree and willing to let our guard down.</p> <p>As the effects of the alcohol wear off, your brain works to rebalance these chemicals by <a href="https://www.sciencedirect.com/science/article/pii/S0191886918305762">reducing GABA and increasing glutamate</a>. This shift has the opposite effect of the night before, causing your brain to become more excitable and overstimulated, which can lead to feelings of anxiety.</p> <p>So why do some people get hangxiety, while others don’t? There isn’t one clear answer to this question, as several factors can play a role in whether someone experiences hangover-related anxiety.</p> <h2>Genes play a role</h2> <p>For some, a hangover is simply a matter of how much they drank or how hydrated they are. But genetics may also play a significant role. <a href="https://onlinelibrary.wiley.com/doi/10.1111/add.12699">Research</a> shows your genes can explain almost half the reason why you wake up feeling hungover, while your friend might not.</p> <p>Because genes influence how your body processes alcohol, some people may experience more intense hangover symptoms, such as headaches or dehydration. These stronger physical effects can, in turn, <a href="https://onlinelibrary.wiley.com/doi/pdf/10.1002/hup.2623">trigger anxiety during a hangover</a>, making you more susceptible to “hangxiety.”</p> <h2>Do you remember what you said last night?</h2> <p>But one of the most common culprits for feeling anxious the next day is often <a href="https://journals.sagepub.com/doi/pdf/10.1177/0091450915604988">what you do while drinking</a>.</p> <p>Let’s say you’ve had a big night out and you can’t quite recall a conversation you had or something you did. Maybe you acted in ways that you now regret or feel embarrassed about. You might fixate on these thoughts and get trapped in a cycle of worrying and rumination. This cycle can be hard to break and can make you feel more anxious.</p> <p><a href="https://doi.org/10.1016/j.addbeh.2023.107619">Research</a> suggests people who already struggle with feelings of anxiety in their day-to-day lives are especially vulnerable to hangxiety.</p> <p>Some people drink alcohol to unwind after a stressful day or to make themselves feel more comfortable at social events. This often leads to <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9756407">heavier consumption</a>, which can make hangover symptoms more severe. It can also begin a cycle of drinking to feel better, making hangxiety even harder to escape.</p> <h2>Preventing hangover anxiety</h2> <p>The best way to prevent hangxiety is to limit your alcohol consumption. The <a href="https://adf.org.au/reducing-risk/alcohol/alcohol-guidelines">Australian guidelines</a> recommend having no more than ten standard drinks per week and no more than four standard drinks on any one day.</p> <p>Generally, the more you drink, the more intense your hangover symptoms might be, and the worse you are likely to feel.</p> <p>Mixing other drugs with alcohol can also increase the risk of hangxiety. This is especially true for party drugs, such as ecstasy or MDMA, that give you a temporary high but can lead to anxiety as they wear off and you are <a href="https://adf.org.au/insights/drug-comedowns">coming down</a>.</p> <p>If you do wake up feeling anxious:</p> <ul> <li> <p>focus on the physical recovery to help ease the mental strain</p> </li> <li> <p>drink plenty of water, eat a light meal and allow yourself time to rest</p> </li> <li> <p>try <a href="https://www.headspace.com/mindfulness/mindfulness-101">mindfulness meditation</a> or deep breathing exercises, especially if anxiety keeps you awake or your mind races</p> </li> <li> <p>consider journalling. This can help re-frame anxious thoughts, put your feelings into perspective and encourage self-compassion</p> </li> <li> <p>talk to a close friend. This can provide a safe space to express concerns and feel less isolated.</p> </li> </ul> <p>Hangxiety is an unwelcome guest after a night out. Understanding why hangxiety happens – and how you can manage it – can make the morning after a little less daunting, and help keep those anxious thoughts at bay.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/240991/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/blair-aitken-1510537">Blair Aitken</a>, Postdoctoral Research Fellow in Psychopharmacology, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a> and <a href="https://theconversation.com/profiles/rebecca-rothman-2231560">Rebecca Rothman</a>, PhD Candidate in Clinical Psychology, School of Health Sciences, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/why-do-i-get-so-anxious-after-drinking-heres-the-science-behind-hangxiety-240991">original article</a>.</em></p>

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What causes the itch in mozzie bites? And why do some people get such a bad reaction?

<p><em><a href="https://theconversation.com/profiles/cameron-webb-6736">Cameron Webb</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p>Are you one of these people who loathes spending time outdoors at dusk as the weather warms and mosquitoes start biting?</p> <p>Female mosquitoes <a href="https://www.annualreviews.org/content/journals/10.1146/annurev-ento-120811-153618">need blood</a> to develop their eggs. Even though they take a tiny amount of our blood, they can leave us with itchy red lumps that can last days. And sometimes something worse.</p> <p>So why does our body react and itch after being bitten by a mosquito? And why are some people more affected than others?</p> <h2>What happens when a mosquito bites?</h2> <p>Mosquitoes are attracted to warm blooded animals, including us. They’re attracted to the <a href="https://www.cambridge.org/core/journals/bulletin-of-entomological-research/article/abs/role-of-carbon-dioxide-in-hostfinding-by-mosquitoes-diptera-culicidae-a-review/2506B86EF63852B2D02EC3FCEE1E3B8B">carbon dioxide</a> we exhale, our body temperatures and, most importantly, <a href="https://www.abc.net.au/news/2024-11-08/mosquitoes-climate-change-skin/104548122">the smell of our skin</a>.</p> <p>The <a href="https://www.cell.com/trends/parasitology/abstract/S1471-4922(21)00237-3">chemical cocktail</a> of odours from bacteria and sweat on our skin <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(23)00532-8">sends out a signal</a> to hungry mosquitoes.</p> <p><a href="https://www.sciencedirect.com/science/article/pii/S2667114X21000522">Some people’s</a> skin smells more appealing to mosquitoes, and they’re more likely to be bitten than others.</p> <p>Once the mosquito has made its way to your skin, things get a little gross.</p> <p>The mosquito pierces your skin with their “proboscis”, their feeding mouth part. But the proboscis isn’t a single, straight, needle-like tube. There are multiple tubes, <a href="https://www.npr.org/sections/health-shots/2016/06/07/480653821/watch-mosquitoes-use-6-needles-to-suck-your-blood">some designed</a> for sucking and some for spitting.</p> <p>Once their mouth parts have been inserted into your skin, the mosquito will inject some saliva. This contains a mix of chemicals that gets the blood flowing better.</p> <p>There has even been a suggestion that future medicines could be inspired by the <a href="https://www.sydney.edu.au/news-opinion/news/2018/03/29/mosquito-saliva-vital-to-the-discovery-of-future-drugs.html">anti-blood clotting properties</a> of mosquito saliva.</p> <p>It’s not the stabbing of our skin by the mosquito’s mouth parts that hurts, it’s the mozzie spit our bodies don’t like.</p> <h2>Are some people allergic to mosquito spit?</h2> <p>Once a mosquito has injected their saliva into our skin, a variety of reactions can follow. For the lucky few, nothing much happens at all.</p> <p>For most people, and irrespective of the type of mosquito biting, <a href="https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.1024559/full">there is some kind of reaction</a>. Typically there is <a href="https://www.sciencedirect.com/science/article/abs/pii/S0161589023002304?via%3Dihub">redness and swelling of the skin</a> that appears within a few hours, but often more quickly, after just a few minutes.</p> <p>Occasionally, the reaction can cause pain or discomfort. Then comes the <a href="https://www.abc.net.au/news/health/2023-01-20/mosquito-bites-itchy-calamine-heat-ice-antihistamine-toothpaste/101652608">itchiness</a>.</p> <p>Some people do suffer severe reactions to mosquito bites. It’s a condition often referred to as “<a href="https://www.webmd.com/allergies/what-is-skeeter-syndrome">skeeter syndrome</a>” and is an allergic reaction caused by the protein in the mosquito’s saliva. This can cause large areas of swelling, blistering and fever.</p> <p>The chemistry of mosquito spit hasn’t really been well studied. But it has been shown that, for those who do suffer allergic reactions to their bites, the <a href="https://www.sciencedirect.com/science/article/abs/pii/S0091674904022183">reactions may differ</a> depending on the type of mosquito biting.</p> <p>We all probably get more tolerant of mosquito bites as we get older. Young children are certainly more likely to suffer more following mosquito bites. But as we get older, the reactions are less severe and may pass quickly without too much notice.</p> <h2>How best to treat the bites?</h2> <p>Research into treating bites <a href="https://linkinghub.elsevier.com/retrieve/pii/S0161589023002304">has yet to provide</a> a single easy solution.</p> <p>There are many <a href="https://www.healthline.com/health/outdoor-health/home-remedies-for-mosquito-bites">myths and home remedies</a> about what works. But there is little scientific evidence supporting their use.</p> <p>The best way to treat mosquito bites is by applying a cold pack to reduce swelling and to keep the skin clean to avoid any secondary infections. Antiseptic creams and lotions may also help.</p> <p>There is some evidence that <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10309056/">heat may alleviate</a> some of the discomfort.</p> <p>It’s particularly tough to keep young children from scratching at the bite and breaking the skin. This can form a nasty scab that may end up being worse than the bite itself.</p> <p>Applying an anti-itch cream may help. If the reactions are severe, <a href="https://www.healthdirect.gov.au/insect-bites-and-stings">antihistamine medications</a> may be required.</p> <h2>To save the scratching, stop the bites</h2> <p>Of course, it’s better not to be bitten by mosquitoes in the first place. Topical <a href="https://theconversation.com/insect-repellents-work-but-there-are-other-ways-to-beat-mosquitoes-without-getting-sticky-171805">insect repellents</a> are a safe, effective and affordable way to reduce mosquito bites.</p> <p>Covering up with loose fitted long sleeved shirts, long pants and covered shoes also provides a physical barrier.</p> <p><a href="https://theconversation.com/are-mosquito-coils-good-or-bad-for-our-health-88548">Mosquito coils and other devices</a> can also assist, but should not be entirely relied on to stop bites.</p> <p>There’s another important reason to avoid mosquito bites: millions of people around the world suffer from mosquito-borne diseases. More than <a href="https://www.who.int/news-room/fact-sheets/detail/malaria">half a million people die</a> from malaria each year.</p> <p>In Australia, <a href="https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1005070">Ross River virus</a> infects more than 5,000 people every year. And in recent years, there have been cases of serious illnesses caused by <a href="https://www.science.org/content/article/how-rains-pigs-and-waterbirds-fueled-shocking-disease-outbreak-australia">Japanese encephalitis</a> and <a href="https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2023.1256149/full">Murray Valley encephalitis</a> viruses.</p> <p><em><a href="https://theconversation.com/profiles/cameron-webb-6736">Cameron Webb</a>, Clinical Associate Professor and Principal Hospital Scientist, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-causes-the-itch-in-mozzie-bites-and-why-do-some-people-get-such-a-bad-reaction-243044">original article</a>.</em></p>

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Airlines cancel flights after volcanic eruptions. An aviation expert explains why that’s a good thing

<p><em><a href="https://theconversation.com/profiles/patrick-murray-2027113">Patrick Murray</a>, <a href="https://theconversation.com/institutions/university-of-southern-queensland-1069">University of Southern Queensland</a></em></p> <p>At least three airlines <a href="https://www.abc.net.au/news/2024-11-13/flights-to-and-from-bali-cancelled-due-to-volcanic-ash/104593698">cancelled flights between Australia and Bali</a> this week after a volcano eruption in eastern Indonesia spewed a vast plume of volcanic ash into the air.</p> <p>But while would-be holiday makers are naturally <a href="https://7news.com.au/sunrise/volcanic-eruption-in-indonesia-forces-airlines-to-cancel-flights-to-bali-stranding-frustrated-passengers-c-16732486">upset</a> at having their plans disrupted, it’s worth remembering it’s not safe to fly planes through volcanic ash.</p> <p>So, how do airlines decide it’s not safe to fly when a volcano erupts? And why is volcanic ash so dangerous for aircraft, anyway?</p> <h2>What does volcanic ash do to a plane?</h2> <p>Volcanic ash particles are very, very abrasive. They can cause permanent damage to windscreens in the aircraft and can even make windscreens look opaque – like someone has gone over them with sandpaper.</p> <p>Imagine getting spectacles and scraping them over and over with sandpaper – that’s what you’d see if you were sitting in the cockpit.</p> <p>Volcanic ash can also clog or damage external sensors, leading to erroneous readings, and can infiltrate an aircraft’s ventilation system. This can affect cabin air quality and lead to potential respiratory issues.</p> <p>But the main issue, in fact, is the impact volcanic ash has on engines.</p> <p>A jet engine works by drawing in air, compressing it, mixing it with fuel and igniting it. This creates high-pressure exhaust gases that are expelled backward, which pushes the engine (and the aircraft) forward.</p> <p>The correct balance of fuel and airflow is crucial. When you disrupt airflow, it can cause the engine to stall.</p> <p>Ash particles that get inside the engines will melt and build up, causing disruption of the airflow. This could cause the engine to “flame out” or stall.</p> <p>Volcanic ash has a lot of silica in it, so when it melts it turns into something similar to glass. It won’t melt unless exposed to very high temperatures – but inside a jet engine, you do get very high temperatures.</p> <p>There was a famous incident in 1982 where a <a href="https://theaviationgeekclub.com/the-story-of-british-airways-flight-9-the-boeing-747-that-lost-all-four-engines-due-to-volcanic-ash-yet-it-landed-safely/">British Airways Boeing 747 plane</a> was flying in the vicinity of Indonesia and lost all four engines after it encountered volcanic ash spewing from Java’s Mount Galunggung.</p> <p>Fortunately, the pilot was able to <a href="https://simpleflying.com/gallunggung-glider-the-story-of-british-airways-flight-9/">restart the engines and land safely</a>, although the pilots were unable to see through the front windscreens.</p> <h2>How do airlines decide it’s not safe to fly when a volcano erupts?</h2> <p>The decision is made by each airline’s operational staff. Each airline’s operational team would be looking at the situation in real time today and making the decision based on their risk assessment.</p> <p>Every airline has a process of risk management, which is required by Australia’s Civil Aviation Safety Authority.</p> <p>Different airlines may tackle risk management in slightly different ways; you might have some cancelling flights earlier than others. But, in broad terms, the more sophisticated airlines would come to similar conclusions and they are likely all communicating with each other.</p> <p>Mostly, they make the call based on the extent of the plume – how big the cloud of ash is and where it’s going, bearing in mind that winds vary with altitude. As you get stronger winds with altitude, the ash can drift quite far from the source.</p> <p>There is also a United Nations agency called the <a href="https://www.icao.int/Pages/default.aspx">International Civil Aviation Organization</a>, which issues guidance on volcanic ash hazards. Various meteorological agencies around the world work together and liaise with aviation authorities to spread the word quickly if there is an eruption.</p> <p>For airlines to resume flights, the ash needs to clear and there needs to be a low probability of further eruptions.</p> <h2>Passenger safety is the priority</h2> <p>The underpinning reason behind these flight cancellations is safety. If you lose engines and you can’t see out the window, the risk to passenger safety is obvious.</p> <p>Naturally, people are upset about their holiday plans being held up. But it’s actually in passengers’ best interests to not fly through volcanic ash.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/243576/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/patrick-murray-2027113">Patrick Murray</a>, Emeritus Professor of Aviation, <a href="https://theconversation.com/institutions/university-of-southern-queensland-1069">University of Southern Queensland</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/airlines-cancel-flights-after-volcanic-eruptions-an-aviation-expert-explains-why-thats-a-good-thing-243576">original article</a>.</em></p>

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