We all must have come across the phase: this is why women live longer than men. These are all over the social media, where men are performing more often than not, some experiments, without gears, just for fun, "in the name of science". The caption reads: this is why women live longer. However, is there really a science to it, other than the fact that women choose to do things more safely?

In the United States, women have a life expectancy of about 80, whereas men have 75. Women outlive men and this holds true regardless of the country women live, the money they make, and other factors. In fact, it is true for most other mammals too.

Dr Dena Dubal, a professor of neurology at the University of California, San Francisco told the New York Times, "It is a very robust phenomenon all over the world, totally conserved in sickness, during famines, during epidemics, even during the times of starvation."

But what are the reasons? These reasons are often more complicated and less established. It is important to note that only because women are outliving men does not mean they are living a better life. In fact, women tend to have shorter health spans, which means the number of healthy years in a person's life is less in women than men, confirmed Bérénice Benayoun, an associate professor at the U.S.C. Leonard Davis School of Gerontology.

As per a 2021 study titled, Sex differences in frailty: Comparisons between humans and preclinical models, found that women are more physically grail than men in old age. They are also more vulnerable, especially after menopause and are at more risk of developing cardiovascular issues and Alzheimer's disease because of age.

The key is in figuring out what makes one sex more resilient or vulnerable.

Genetics

For things which do not find easy explanations, scientists look for their answers in genes. Many research, including a 2020 study titled, The sex with the reduced sex chromosome dies earlier: a comparison across the tree of life, suggests that the XX set of female sex chromosomes may impact longevity. However, there has not been any clarity on how it affects longevity.

Another 2018 study titled, Female XX sex chromosomes increase survival and extend lifespan in aging mice, which was conducted by Dr Dubal's lab, looked at genetically manipulated mice with different combinations of sex chromosomes and reproductive organs. It was found that those with two X chromosomes and ovaries lived longest, followed by mice with two X chromosomes and testes. Mice with XY chromosomes had shorter life spans.

"There was something about the second X chromosome that was protecting the mice from dying earlier in life, even if they had testes. What if there was something on that second X chromosome that was in some ways a sprinkle of the fountain of youth," says Dr Dubal. While scientists have not yet looked at this factor in humans, Dr Dubal suggests that humans have the same hormones and sex chromosomes, and similar reproductive system that could corroborate the similar findings in people.

Hormones

Plenty research has shown that estrogen is responsible for longevity also effect on the immune system. The data also shows that before menopause, the female immune system tends to do better. In fact Dr Benayoun said that males tend to do much worse in response to infection.

Another 2017 study titled, Ages at Menarche and Menopause and Reproductive Lifespan As Predictors of Exceptional Longevity in Women: The Women's Health Initiative, found that women who experienced menopause later in life over the age 50 lived longer than those who experienced it earlier.

Lifestyle and Behavior

There are also disparity in behavioral patterns between men and women. This includes smoking, drinking heavily, which can contribute significantly to mortality. Women also have more "health promoting behavior", believe experts. Women are also more likely to socialize than men and thus it protects them from detrimental effects of social isolation and loneliness. In fact, a 2023 analysis published in Jama Network, titled, Widening Gender Gap in Life Expectancy in the US, 2010-2021, found that women are less likely to die by drug overdose or suicide.

Standing up suddenly from your bed, sofa or chair can sometimes cause a brief “head rush”, you may feel light-headed, notice your vision dimming, feel weak or even slightly unsteady. While this can feel alarming, there is a simple physiological explanation for why it happens.

When you stand up, gravity causes some of your blood to temporarily move towards your legs and abdomen. This reduces the amount of blood returning to the heart. Within seconds, the autonomic nervous system usually steps in by tightening the blood vessels and adjusting the heart rate to maintain blood pressure and ensure enough blood reaches the brain.

When A Sudden Drop In Blood Pressure Becomes A Concern

A brief drop in blood pressure during this transition can be normal. However, if the drop is too significant or the body is unable to compensate properly, it can lead to dizziness, blurred vision, weakness and, in some cases, fainting. Orthostatic hypotension is clinically defined as a sustained fall in systolic blood pressure of at least 20 mmHg or diastolic blood pressure of at least 10 mmHg within three minutes of standing.

Several factors can contribute to this, including dehydration, heat, prolonged inactivity, blood loss and medications that lower blood pressure. Recurrent episodes can also be linked to problems with the autonomic nervous system, including autonomic involvement in Parkinson’s disease and other neurodegenerative disorders.

Also read: The Silent Killer: Why More Indians Need To Pay Attention To Liver Cancer

How To Prevent The Head Rush And When To Seek Help

One simple precaution is to avoid changing positions too quickly, especially after lying down for several hours. Sitting on the edge of the bed for a few moments before standing gives the cardiovascular system time to adjust. Moving your feet or tightening your leg muscles before getting up may also help improve blood flow back to the heart. If you start feeling dizzy, it is safer to sit or lie down rather than trying to walk through it.

An occasional, very brief episode may simply be the body’s normal response to a sudden change in posture. However, frequent episodes, fainting, falls, palpitations or persistent dizziness should not be ignored and warrant medical assessment, particularly in older adults or people taking multiple medications.

Dr Sachin Adukia Sr Consultant M.B.B.S., MD (General Medicine), DNB (Neurology), LH Hiranandani Hospital

Gastroesophageal reflux disease (GERD), commonly known as acid reflux, occurs when stomach contents flow backward into the esophagus, causing heartburn, regurgitation, chest discomfort, and sometimes chronic cough or hoarseness. This happens because the lower esophageal sphincter (LES), a muscle that normally prevents backflow, becomes weak or relaxes inappropriately, allowing acid to irritate the food pipe repeatedly. If left untreated, persistent reflux can lead to inflammation (esophagitis), ulcers, scarring, and in rare cases, pre-cancerous changes known as Barrett’s esophagus.

The global prevalence of GERD has been increasing in recent years, with around 14 % of adults worldwide affected according to recent meta-analyses. In India, community studies show notable rates, with higher prevalence in urban populations compared to rural areas and estimates ranging from about 8 % in some regions to higher figures in cities, reflecting shifting lifestyles. In Kolkata, according to Dr. Pradipta Sethy, Director, Gastroenterology, Manipal Hospital, EM Bypass and Mukundupur, the major patients are women, mostly pre-menopausal and menopausal, between the ages of 30-55 years. This rise can be attributed to several interconnected lifestyle and environmental factors.

One major contributor is dietary change. Traditional diets rich in fiber and whole foods are increasingly replaced by high-calorie, processed, and high-fat foods, along with frequent consumption of spicy and fried items. These foods can relax the LES and increase gastric acid production, making reflux more likely. In addition, habitual late-night meals followed by lying down soon after eating are common in urban settings and further promote reflux episodes.

Obesity and sedentary lifestyles are also important risk factors. Excess abdominal fat increases pressure on the stomach, forcing acid upward into the esophagus. Many adults with GERD in India and globally have overweight or central obesity, a trend growing alongside reduced physical activity. Stress and irregular eating patterns that accompany modern work life are additional contributors, often exacerbating symptoms and prompting unhealthy habits like caffeine or alcohol use, both of which can aggravate acid reflux.

Thankfully, GERD can often be managed effectively through simple lifestyle modifications. Eating smaller, more frequent meals and avoiding known trigger foods such as citrus fruits, chocolate, caffeine, and high-fat foods can reduce reflux episodes. Waiting 2–3 hours after eating before lying down and elevating the head of the bed during sleep helps keep acid in the stomach by using gravity to support digestion. Maintaining a healthy weight through regular physical activity reduces abdominal pressure, while quitting smoking and limiting alcohol intake supports LES function and esophageal health. Managing stress with techniques such as meditation or yoga further helps control symptoms by improving overall digestive function.

In conclusion, the rise of GERD in India mirrors global trends driven largely by dietary shifts, obesity, and modern lifestyle pressures. While medication is valuable for many patients, sustainable improvements often begin with these evidence-based lifestyle changes that address the root causes of acid reflux and improve long-term digestive health.

Rashes are common in children and can occur for many reasons. Most are harmless and settle on their own, but some may need medical attention. Knowing the warning signs can help parents decide when home care is enough and when to consult a doctor.

Why Do Rashes Happen?

Children’s skin is sensitive and can react to heat, friction, allergens, insect bites, irritants or infections. Common causes include heat rash, eczema, contact dermatitis, insect bites and viral infections such as chickenpox, hand-foot-and-mouth disease and roseola.

A rash can look worrying, but the child’s overall condition is often as important as the appearance of the rash itself.

When Home Care May Be Enough

If your child is active, reasonably comfortable, feeding and drinking well, and otherwise appears well, a mild rash can often be managed at home.

Home care may be appropriate when the rash:

• Is mild and limited to a small area
• Is not spreading quickly
• Causes only mild itching or discomfort
• Occurs without concerning symptoms
• Looks consistent with a known condition such as heat rash or eczema

Avoid applying multiple creams, powders, antiseptics or home remedies, as these may irritate the skin or make the rash harder to assess. Medicines or steroid creams should not be used without medical advice. Your paediatrician can recommend suitable treatment based on your child’s age, weight and the likely cause of the rash.

When Should You See a Doctor?

Seek medical advice if your child has:

• A rash with fever, particularly if the child appears unwell, unusually sleepy, less responsive or is becoming progressively worse
• A red or purple rash that does not fade or become lighter when pressed firmly with a clear glass, especially if the child has fever or appears unwell
• A rapidly spreading rash
• Large blisters, peeling skin or a painful/tender rash
• Signs of a secondary skin infection, such as increasing redness, warmth, swelling, pain or pus
• A new or unexplained rash in a newborn or young infant, especially if accompanied by fever, poor feeding or unusual sleepiness
• Unusual sleepiness, weakness, poor feeding or reduced drinking
• A rash that is getting worse, keeps recurring or does not improve with appropriate home care

Seek Emergency Care Immediately If

A rash is accompanied by:

• Difficulty breathing or swallowing
• Swelling of the lips, mouth, face or tongue
• Extreme sleepiness, marked weakness or a child who is difficult to wake
• Rapid deterioration in the child’s overall condition
• A concerning non-fading red or purple rash in a child who appears unwell

What Parents Should Remember

Most childhood rashes are temporary and harmless. However, it is important to look beyond the rash itself.

Note when the rash started, where it first appeared, whether it is spreading and whether your child has fever or other symptoms. A photo of the rash can also help your paediatrician understand how it has changed over time.

Trust your instincts. If your child seems unusually unwell, is getting worse or something simply does not feel right, it is always better to seek medical advice rather than waiting.

A Simple Rule for Parents

Home care may be enough if your child is well, active and comfortable. Seek medical attention if the rash is accompanied by significant illness, rapid worsening or any warning signs.

By Dr Navin Bhatia, Senior Consultant & HOD – Paediatrics & PICU, PB Health