From controlling body temperature and flushing out toxins, adequate hydration plays a vital role in our general health and well-being, water is a life essential. However, while dehydration garners significant attention, overhydration, or drinking excessive amounts of water, is a condition that can have serious and sometimes fatal consequences.

Although it may sound bizarre since drinking water is said to be the solution for most health related problems it is important to recognize how much water is considered "too much" or the risks involved with being overhydrated can maintain a healthy balance.

What Is Water Intoxication?

Water intoxication, also termed hyperhydration, water poisoning or water toxemia, develops when an individual drinks much more water than the kidney can excrete. The main function of the kidneys in the human body is the processing and excretion of excess water. However, the human kidneys can process only up to 0.8 to 1.0 liters of water at a time. Drinking an amount that exceeds this may overwhelm the kidneys and put the electrolyte balance out of sync in the human body.

Electrolytes, especially sodium, are essential in maintaining fluid balance within and outside cells. Hyponatremia is the condition when sodium levels fall below 135 mmol/L, resulting from excessive water intake. This causes water to shift into cells, swelling them. In the brain, this can cause severe complications, including coma or even death.

Symptoms of Water Intoxication

The symptoms of water intoxication vary from mild to severe. Early symptoms are often similar to dehydration, which makes self-diagnosis challenging. Common symptoms include:

• Headaches
• Nausea and vomiting
• Muscle cramps or weakness
• Fatigue or drowsiness
• Confusion and disorientation

In more serious cases, water intoxication can cause seizures, loss of consciousness, or swelling in the brain. These complications can be fatal if left untreated.

A notable case occurred in 2007 when a woman participating in a water-drinking contest tragically died after consuming nearly two gallons of water in under two hours. More recently, actress Brooke Shields experienced a grand mal seizure attributed to excessive water consumption.

Causes of Water Intoxication

Water intoxication is rare, but certain scenarios can increase the risk:

1. Sporting Events and Endurance Training

These endurance athletes are prone to water intoxication, especially if they drink large amounts of water without replacing lost electrolytes. Hyponatremia usually happens during long races or marathons as individuals mistake fatigue and muscle cramps for dehydration and continue drinking water in excess.

2. Military Training

Overhydration among military personnel is usually due to severe physical activity in extreme environmental conditions. The total number of hyponatremia cases documented from 2007 through 2022 for the active duty in the United States exceeds 1,600, with a note to this problem on exertion-related overhydration.

3. Mental Health Conditions

Compulsive water drinking, known as psychogenic polydipsia, is linked with some mental illnesses such as schizophrenia and psychosis. People with these conditions tend to drink too much water, causing a hazardous electrolyte imbalance.

4. Drug Abuse

Drugs such as MDMA (ecstasy) raise the body temperature and make people thirsty, and at times, some people tend to drink excess water at events like music festivals. MDMA also leads to urine retention, thus exacerbating the dangers of water intoxication.

How Much Water Is Too Much?

The exact amount of water that causes intoxication varies from one person to another. However, drinking more than 1 liter of water per hour for several hours raises the risk. For healthy individuals, the risk of overhydration is low unless taking part in extreme physical activity or ignoring thirst cues.

Certain medical conditions, such as kidney or liver disorders, can impair the body's ability to process fluids, and even moderate water intake may be harmful. Similarly, certain medications, such as diuretics and antipsychotics, can affect the perception of thirst or fluid regulation.

How Much Water Is Enough?

The widely touted recommendation of eight 8-ounce glasses of water per day has little basis in fact. According to the National Academy of Medicine, a daily total fluid intake is about 15 cups (3.7 liters) for males and 11 cups (2.7 liters) for females, from beverage sources and from food. Usually, about 20 percent of daily hydration comes from foods such as fruits and vegetables.

A better rule of thumb is to listen to your body and drink water based on thirst. Use the color of your urine as an indicator:

• Light yellow urine indicates proper hydration.
• Dark yellow urine may indicate dehydration.

Older adults, whose thirst mechanisms may decline with age, should be proactive about maintaining hydration, especially during illness or hot weather.

Water Intoxication vs. Dehydration

The symptoms of water intoxication—such as headaches, fatigue, and muscle weakness—are similar to those of dehydration. If you are unsure which condition you are experiencing, seek medical attention immediately rather than self-treating with more water.

Preventing Water Intoxication

To avoid the dangers of overhydration:

• Drink water gradually throughout the day rather than consuming large amounts at once.
• Replace lost electrolytes post high-intensity exercise or heavy sweating.
• Consider using sports drinks or salty snacks to help replenish sodium.
• Keep track of fluid consumption during long-duration activities, and do not consume more water than the body is losing in terms of electrolytes.
• If on medications or have specific medical conditions, check with your doctor regarding the safety of drinking water.

For signs of severe water intoxication-including confusion, drowsiness, seizures, and loss of consciousness-customer is advised to seek medical assistance immediately. In the meanwhile, a salty snack would help to temporarily correct low sodium levels.

Hydration is important to health, but overhydration can be a serious risk; the secret is in finding a balance. Drink enough water to satisfy your body, but not so much that it overwhelms your system. Remember, water is life, but moderation keeps it that way.

Hyponatremia (low sodium level in the blood). National Kidney Foundation. 2023.

Water Toxicity. NIH. 2023

Exercise-Associated Hyponatremia: 2017 Update. Front Med (Lausanne). 2017

Update: Exertional Hyponatremia Among Active Component Members of the U.S. Armed Forces, 2007–2022

Most women who've had preeclampsia remember it as something that happened during pregnancy. The blood pressure spiked, doctors kept a close watch, the baby arrived, and everything went back to normal.

Case closed, or so it seems. But there's a quieter part of this story that doesn't get told nearly enough - what preeclampsia might mean for a woman's heart years down the line.

So, What Is Preeclampsia?

It's a condition that can happen after the 20th week of pregnancy, when blood pressure rises sharply and starts putting pressure on organs like the kidneys or liver. During preeclampsia, the lining of blood vessels - the endothelium - becomes inflamed and doesn't relax and dilate the way it normally should.

This is the same vessel dysfunction we see in the early stages of coronary artery disease, just decades ahead of schedule. Doctors usually catch it through routine checks - protein in the urine, sudden swelling, or blood pressure readings that don't sit right.

Once the baby is delivered, blood pressure almost always comes back down. That "return to normal," though, doesn't mean the story is over.

Also read: Vitamin D & Pregnancy: Could Vitamin D Deficiency Increase Risk Of Premature Birth?

A Pregnancy Complication with a Long Impact on Heart

Think of preeclampsia as an early stress test that the heart didn't quite pass. It is associated with increased risk of hypertension in future and also increase the risk of heart failure, stroke and cardiovascular diseases. And this isn’t a risk that shows up only in old age, in some cases, death happens within the first 10 years after pregnancy.

The risk of heart failure also increases by four-fold and the risk of coronary heart disease by two folds in patients with preeclampsia. The risk of ischemic heart disease and hypertension is elevated too. The risk increases further if preeclampsia occurred early in pregnancy, during multiple pregnancies, or alongside other factors like obesity or a family history of heart disease.

It highlights the importance of life law monitoring of cardiovascular rest factors in a woman who has history of preeclampsia.

Also read: PMOS Isn't Just About Periods Or Pregnancy: Why Women Need To Think Beyond Fertility

The Part of Care That Often Gets Skipped

Once the baby is here, attention naturally shifts entirely toward the newborn - and a new mother's own follow-ups tend to fall away quietly, usually right after that standard six-week check. That's the gap, we need to close in postpartum care. Women with a preeclampsia history should regularly monitor their blood pressure, cholesterol and blood sugar, and actually bring these numbers up during the consultation.

None of this means preeclampsia guarantees heart disease down the road. It just means the risk picture has shifted, and that's worth knowing. Staying active, eating well, keeping weight in check, and staying away from smoking helps reduce the risk.

More obstetricians and cardiologists are starting to treat preeclampsia as something to track for life, not just for nine months. That shift in thinking could end up protecting a lot of hearts long after the pregnancy itself is over.

By Dr Waseem Farooqui, Consultant, Interventional Cardiology, Cardiac Care, Medanta Hospitals, Noida

After a brain bleed, controlling blood pressure is crucial—but is it enough to prevent another stroke? Neurologists explain why consistent BP monitoring, regular medicines, lifestyle changes, and follow-ups matter after discharge. They also share warning signs families should never ignore and when sudden BP rises require urgent medical attention.

Is Blood Pressure Control Enough After A Brain Bleed?

Dr Shubha Subramanian - Senior Consultant - Neurology - Kauvery Hospital, Vadapalani, Chennai told Health and Me, "After a brain bleed, controlling BP is extremely important, but this is only for spontaneous intracerebral haemorrhage, not in cases of an AV malformation, an aneurysm-related bleed, or a traumatic bleed, where the aetiology is different." He added, "In case of idiopathic spontaneous intracerebral haemorrhage, probably because of BP fluctuations or high BP, in that case, for secondary prevention, there will be a reduced number of bleeds if the BP is well controlled. Consistent control is very, very important."

Also Read: CagriSema Beats Lilly’s Mounjaro & Zepbound In New Trial: All About Novo’s Next-Gen Obesity Drug

After a brain bleed, patients should regularly monitor blood pressure and pulse, with diabetics also checking blood sugar at home. Periodic blood tests and ECGs may be advised. Families should watch for confusion, seizures, weakness, changes in speech, or facial drooping. Recognising these warning signs early and maintaining consistent BP control can help prevent another bleed.

The Common Mistakes That Can Raise The Risk

"Common mistakes include missing medications, not monitoring blood pressure regularly, stopping follow-up visits when they are feeling better, smoking and consuming too much alcohol, and returning too soon to strenuous activity," said Dr. Soniya Tambe, Consultant, Neurology, Fortis Hospital, Bannarghetta Road, Bengaluru. She added, "Patients also may ignore symptoms such as severe headache, weakness, speech difficulty, or vision changes. These signs should never be dismissed."

What To Eat And Avoid During Recovery

Recovery after a brain bleed doesn’t stop when a patient leaves the hospital. The steps taken at home are equally important in reducing the risk of another stroke. Along with taking medicines as prescribed and keeping blood pressure under control, patients should focus on making healthy, long-term lifestyle changes rather than following temporary restrictions.

A balanced, low-salt diet can support recovery, while smoking and alcohol should be avoided. Patients should ease back into physical activity gradually and only with their doctor’s advice, especially in the early recovery period. Getting enough sleep, maintaining a healthy weight, and managing stress are also important. Regular follow-ups help monitor blood pressure and other heart-related risk factors.

Warning Signs Families Should Never Ignore

Dr. Praveen Chander, Senior Consultant Neurology, Gleneagles Chennai, told Health and Me, "Families should also recognise sudden weakness or numbness, difficulty speaking, confusion, loss of balance, severe headache, or sudden vision changes as possible warning signs. These symptoms require immediate medical attention rather than waiting for them to settle."

Alcohol use among US adults has declined for the first time since the COVID-19 pandemic began, driven largely by Gen Z and millennials, a new study found.

However, alcohol use remains above pre-pandemic levels, according to the findings published in the Annals of Internal Medicine.

"It’s encouraging to see alcohol use decline for the first time since the start of the pandemic,” said Brian P. Lee, a hepatologist and liver transplant specialist with Keck Medicine at the University of Southern California and principal investigator of the study.

“However, use remains above pre-pandemic levels and certain groups continue to have concerning trends," he added.

What Did The Study Find?

Also read: BORG Drinking Trend: Why These Viral Alcohol Jugs Can Be Dangerous

Researchers analyzed National Health Interview Survey data from 114,352 US adults between 2018 and 2024.

Heavy drinking was defined as five or more drinks per day or 15 or more drinks per week for men, and four or more drinks per day or eight or more per week for women, in the 12 months before the survey.

From 2022 to 2024, any alcohol use fell by nearly 2%, while heavy drinking declined by more than 8%.

Researchers said this was the first confirmed reduction in alcohol consumption since the pandemic began, following increases in drinking reported in previous studies.

Gen Z, Millennials Cut Back As Older Adults Drink More

The biggest decline in any alcohol use was among Gen Z adults, whose consumption fell by more than 5%.

Millennials recorded the largest drop in heavy drinking, at 17% between 2022 and 2024.

The study did not examine why younger adults reduced their drinking, though researchers noted that changing social attitudes toward alcohol may be one explanation.

In contrast, alcohol use increased among adults aged 50-64. From 2018 to 2024, any alcohol use in this group rose by nearly 4%, while heavy drinking increased by more than 36%.

According to Lee, the increase is particularly concerning because older adults face higher risks of alcohol-related conditions, including liver disease, certain cancers and cardiovascular disease.

"Heavy drinking among ages 50-64 is up by more than a third since 2018, a concerning trend because this age group faces some of the greatest risks of harm from alcohol, including cirrhosis and alcohol-related cancers,” Lee said.

Men saw a larger decline in any alcohol use than women, 2.4% versus 1.1%. However, heavy alcohol use fell more among women than men, 9% versus 7.7%.

Lee noted that understanding differences in drinking patterns could help develop more effective prevention and treatment strategies.

Read More: Heart Diseases, Mental Disorders And Cancer Among 62 Health Risks Linked To Alcohol Use: Study

Does Drinking Less Reverse Alcohol-Related Harm?

Excessive alcohol consumption is one of the leading preventable causes of illness and death in the US, according to the Centers for Disease Control and Prevention.

Alcohol accounts for approximately half of all liver-related deaths, while alcohol-associated cirrhosis has become the leading cause of liver transplants, according to Lee.

The World Health Organization says health risks begin with the first drop of alcohol, meaning no level of consumption is completely safe or risk-free.

Although the decline in alcohol use is a positive development, "we cannot assume alcohol-related harms will decline automatically,” said Lee. “Continued attention to screening, prevention and treatment will be critical, particularly among groups where alcohol use remains elevated.”