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

A simple five-factor risk score may help identify people at high risk of dementia, particularly in low- and middle-income countries (LMICs), where around 60% of the world's dementia cases now occur.

Developed and validated by researchers at Northumbria University, the risk score uses five everyday factors to identify older adults at higher risk of dementia. It aims to address a gap in dementia research, as existing prediction tools have largely been developed using data from high-income countries and may not work as well in lower-income settings.

The research team developed the model using data from more than 11,000 older adults across seven countries and three continents.

“We know the burden of dementia is shifting towards lower-income parts of the world, yet the prediction models clinicians and researchers rely on were designed with wealthier populations in mind. This model is a step towards changing that. It is simple, it is built for the settings where it is needed most, and it gives researchers a practical way to find the people who should be the focus of future studies and trials,” said Dr Eduwin Pakpahan, from Northumbria University's Applied Statistics and Data Science Research Group. The study is published in the American Journal of Epidemiology.

What Are The Five Factors Used To Predict Dementia Risk?

Also read: WHO's New Dementia Guidelines Prioritize Healthy Habits, Warn Against Supplements

The model can be applied using information gathered through a straightforward conversation with an older adult and, where relevant, a family member or carer. It does not require blood tests, brain scans or specialist equipment.

The five factors included in the risk score are:

• Age: The strongest single predictor. Dementia risk rises meaningfully from age 70 and more steeply from 80 onwards.
• Social engagement: This includes whether a person is married or living with others, how often they meet friends or family, and whether they participate in community or religious groups.
• Physical activity: The model considers how active a person is in daily life, across both work and leisure. Everyday movement, such as farming, walking to the market or doing household tasks, also counts.
• High blood pressure: Uncontrolled hypertension can damage the blood vessels supplying the brain over time. It is common, often undiagnosed in lower-income settings, and inexpensive to manage.
• Difficulty managing money: A family member or carer is asked whether the person has experienced a noticeable change in their ability to handle finances. This can be one of the early everyday signs of cognitive change.

How Does The Dementia Risk Score Work?

Each factor contributes points towards a total score ranging from 0 to 9. A person scoring 0 has around a 1% chance of developing dementia within three years, while someone scoring 9 has a nearly 19% chance.

The researchers built and tested the model across seven sites in China, Cuba, the Dominican Republic, Puerto Rico, Venezuela, Mexico and Peru. It achieved a performance score of 0.75, above the 0.70 threshold generally regarded as clinically useful.

However, the researchers emphasise that the tool is primarily intended for research rather than routine screening of the general population. It could give researchers and clinical trial teams a practical, low-cost way to identify and recruit people at higher risk of dementia.

The team has also called for the model to be validated in regions not covered by the study, particularly South Asia, the Middle East and North Africa, and Sub-Saharan Africa.

Read More: Dementia Is More Than Forgotten Birthdays, Lost Keys: Doctors Explain Early Signs Before Memory Loss

Why Is A Dementia Risk Prediction Tool Important?

Dementia affects more than 57 million people worldwide, with around 60% of cases occurring in LMICs across Latin America, the Caribbean, Asia and Africa.

Identifying people at higher risk could help researchers in these regions plan studies and clinical trials that better reflect their populations. A simple tool based on everyday information may also make risk assessment more accessible in settings where specialised diagnostic resources are limited.

From Independence Day and Janmashtami to Ganesh Chaturthi, Onam, Eid, Navratri, Dussehra, Diwali, Christmas and New Year, the period from August to January means celebrations across the country. However, some can also suffer from stress, loneliness and worsening of pre-existing mental health symptoms.

In India, festivals can provide connection, cultural continuity and family bonding. However, celebration is not positive for everyone. For some, the period can lead to issues such as social pressure, loneliness, grief, financial concerns and even interpersonal conflict. Festive periods can be challenging for the general population, while people with pre-existing mental health conditions may be vulnerable to worsening symptoms, increased sensitivities or relapse.

Festivals carry an expectation that everyone should be happy. People are expected to participate, dress up, attend gatherings and appear enthusiastic. Though some may experience anxiety, burnout, depression or emotional exhaustion, maintaining this expected level of participation can become another source of stress. Emotional wellbeing does not automatically change because it is a festival. Recognising this can reduce guilt and self-criticism.

Family Gatherings And Emotional Sensitivities

Festivals frequently bring extended families together. While this can strengthen relationships, it can also reactivate longstanding interpersonal dynamics. Questions about marriage, children, career, finances, appearance or personal choices can become uncomfortable, particularly when they touch existing vulnerabilities.

For someone who has experienced criticism or comparison within the family, a seemingly casual festive comment may carry considerably more emotional weight because of the history attached to it. The festive setting can therefore bring individuals into closer contact with relationships or unresolved issues that they may otherwise have greater distance from.

Also read: Excessive Screen Time & Mental Health: Expert Urges Parents To Limit Children's Screen Time At Times Health Summit 2026

Why Clinical Populations May Be More Vulnerable

For individuals already living with a mental health condition, the festive season can introduce several stressors simultaneously. Travel, disrupted sleep, irregular meals, increased social stimulation, financial pressure, family conflict and interruptions to established treatment routines can place additional demands on psychological functioning.

People with conditions such as depression, anxiety disorders, bipolar disorder, trauma-related conditions, obsessive-compulsive symptoms, eating disorders or other psychiatric difficulties may be more sensitive to these changes.

In individuals with a history of recurrent episodes, significant disruption may also contribute to relapse. Festivals themselves do not necessarily cause relapse. Rather, the accumulation of environmental, interpersonal and behavioural stressors can increase vulnerability in someone already at risk.

Changes from an individual's usual baseline such as significant alterations in sleep, appetite, mood, anxiety, irritability, impulsivity, social withdrawal or functioning can therefore be important early warning signs.

Grief Can Become More Visible

Many traditions are built around shared experiences: preparing food, decorating homes, travelling to family members, exchanging gifts or gathering for meals. When someone important is no longer present, familiar rituals can make their absence more noticeable.

This can occur during religious festivals as well as occasions such as Independence Day or New Year, when people naturally reflect on their lives and relationships. Participating in a celebration does not mean grief has disappeared, just as sadness during a celebration does not eliminate the capacity for joy.

The festive season can also place pressure on household finances. Clothing, gifts, travel, home decoration and social events can increase expenditure over several months. For those already experiencing financial uncertainty, this can create considerable stress.

People living alone, those estranged from family, individuals experiencing relationship difficulties, older adults and people who have recently relocated may become more conscious of social isolation during this period. New Year can be particularly challenging because social expectations around parties, relationships and celebration become highly visible.

Also read: Can Mental Health Improvement Help Lower High Blood Pressure? Study Points Towards 3 Habits

Indians Living Abroad: Culture, Belonging and Homesickness

Celebrating Diwali, Eid, Navratri, Onam, Christmas or Gurpurab away from India can provide an important connection with cultural identity and family traditions. At the same time, it can highlight physical distance from parents, siblings and extended family.

A person may attend a community celebration abroad while still missing the food, sounds, neighbourhood atmosphere and family rituals associated with celebrations in India. Those unable to travel home may experience increased homesickness, particularly when several major occasions occur within a short period.

Festivals Can Be Difficult For General Population Too

Feeling tired, overwhelmed, irritated, lonely or emotionally sensitive during a demanding period does not automatically indicate a psychiatric disorder.

Even psychologically healthy individuals can experience festive stress because of travel, social obligations, financial commitments or difficult family interactions.

Making The Festive Season Psychologically Sustainable

• Set boundaries around intrusive questions: “I’d rather not discuss that today” or “We’re comfortable with where things are right now” can end conversations about marriage, children or finances without confrontation.
• Decline invitations without over-explaining.
• A smaller number of meaningful gatherings may be preferable to trying to attend every event.
• Decide spending limits for gifts, travel and celebrations in advance rather than responding to social pressure.

For those receiving mental health care, prescribed medication, therapy and established support systems should not be casually disrupted during the festive period.

Curated festive content represents selected moments, not the entirety of another person's life.

Professional support becomes particularly important when festive stress is accompanied by persistent hopelessness, severe anxiety, substantial social withdrawal, changes in sleep or appetite, increased substance use, impaired functioning or other marked behavioural changes.

The goal is not to remove complexity from celebration, but to make space for it. Allowing people to experience the festive season without the pressure to feel festive can itself be an important form of psychological care.

By Ms Dhara Ghuntla, Psychologist/Psychotherapist, Sujay Hospital, 7 Hills Hospital & Criticare Hospital

As Delhi wakes up to another spell of deteriorating air quality just days ahead of Diwali, ophthalmologists warn that dust, smoke, particulate matter, and toxic gases can affect children's eyes, triggering redness, itching, burning, excessive watering, and dryness.

On Tuesday, India's national capital's average Air Quality Index (AQI) climbed to 331 at 7 am, entering the ‘very poor’ category. At the same time, eight monitoring stations recorded readings above 400, falling in the ‘severe’ zone, according to the Central Pollution Control Board (CPCB).

As per data from the CPCB, 33 of the city's 58 monitoring stations recorded AQI levels in the ‘very poor’ category. Meanwhile, the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology have forecast that air quality is likely to remain in the ‘very poor’ category over the coming days.

“Children’s eyes are more sensitive to irritants in the environment, and exposure to pollutants, particulate matter and toxic gases can irritate the surface of the eye,” Dr Shibal Bhartiya, Clinical Director – Ophthalmology and Program Director – Community Outreach and Wellness at Marengo Asia International Institute of Neuro and Spine (MAIINS), told HealthandMe.

Also read: Supreme Court Allows Green Crackers In Delhi-NCR Ahead Of Diwali: Are They Really Safe For Your Health?

How Does Air Pollution Affect Children's Eyes?

The experts warned that exposure to pollutants and particulate matter can irritate the surface of children's eyes, causing redness, itching, burning, excessive tearing and dryness.

Dr Neepa Thacker Dave, Senior Consultant in Paediatric Ophthalmology at SRCC Children's Hospital, told HealthandMe that the eye’s surface is protected by a delicate tear film that provides lubrication, maintains clear vision and helps defend against environmental irritants. Exposure to airborne pollutants can disturb this protective layer and contribute to ocular surface irritation and inflammation.

"Excessive watering does not necessarily mean that the eyes are adequately lubricated. Irritation can trigger reflex tearing even when the tear film is unstable. Consequently, children may experience watering alongside dryness or discomfort," she said.

Further, children with existing allergies or sensitive eyes may notice their symptoms worsening during periods of high pollution.

“Long-term exposure to poor air quality may also worsen pre-existing ocular surface conditions,” Dr Bhartiya said.

How Can Parents Protect Children's Eyes From Air Pollution?

Read More: Rising AQI In Delhi-NCR: Doctors Warn Of Lung And Heart Risks As Pollution Builds

Reducing children's exposure to pollution is important, particularly on days when air quality is poor.

Dr Bhartiya advised parents to:

• Avoid outdoor activities when pollution levels are high.
• Keep windows closed during periods of severe pollution.
• Encourage children to avoid rubbing their eyes.
• Ensure children wash their faces after coming indoors.

Dr Dave also highlighted the importance of greater awareness, reduced exposure and timely medical care in protecting children from pollution-related eye irritation and discomfort.

When Should Children See an Eye Specialist?

Dr Dave said children may not always have the vocabulary to describe eye discomfort. Parents and teachers should watch for frequent eye rubbing, excessive blinking, squinting, watering or reluctance to participate in reading and outdoor activities.

Parents should not dismiss eye irritation in children, particularly when pollution levels are high.

Although mild irritation may improve when exposure is reduced, recurring or persistent symptoms warrant an eye examination. Eye pain, significant sensitivity to light, blurred or reduced vision, marked redness or difficulty opening the eye require prompt medical attention.