I dont know why people answer medical questions like this as if they are experts? While searching for "drinking too much water is dangerous" i found at many things:
Here is for you people:
January 12, 2007, a 28-year old Californian wife and mother of three children died from drinking too much water. Her body was found in her home shortly after she took part in a water-drinking contest that was sponsored by a local radio show. It is estimated that the woman who died drank approximately 2 gallons of water during the contest. This tragic news story highlights the importance of understanding why drinking too much water can be dangerous to your health.
Whenever you disregard your sense of thirst and strive to ingest several glasses of water a day just because you have been told that doing so is good for your health, you actually put unnecessary strain on your body in two major ways:
- Ingesting more water than you need can increase your total blood volume. And since your blood volume exists within a closed system - your blood circulatory system - needlessly increasing your blood volume on a regular basis puts unnecessary burden on your heart and blood vessels.
- Your kidneys must work overtime to filter excess water out of your blood circulatory system. Your kidneys are not the equivalent of a pair of plumbing pipes whereby the more water you flush through your kidneys, the cleaner they become; rather, the filtration system that exists in your kidneys is composed in part by a series of specialized capillary beds called glomeruli. Your glomeruli can get damaged by unnecessary wear and tear over time, and drowning your system with large amounts of water is one of many potential causes of said damage.
Putting unnecessary burden on your cardiovascular system and your kidneys by ingesting unnecessary water is a subtle process. For the average person, it is virtually impossible to know that this burden exists, as there are usually no obvious symptoms on a moment-to-moment basis. But make no mistake about it: this burden is real and can hurt your health over the long term.
Forcing your body to accept a large amount of water within a short period of time - say, an hour or two - as several contestants did during the "Hold Your Wee for a Wii" contest can be fatally dangerous to your health. Here's why:
If you force large amounts of water into your system over a short period of time, your kidneys will struggle to eliminate enough water from your system to keep the overall amount at a safe level.
As your blood circulatory system becomes diluted with excess water, the concentration of electrolytes in your blood will drop relative to the concentration of electrolytes in your cells. In an effort to maintain an equal balance of electrolytes between your blood and your cells, water will seep into your cells from your blood, causing your cells to swell.
If this swelling occurs in your brain, the bones that make up your skull hardly budge. The result is an increase in intracranial pressure i.e. your brain gets squeezed. Depending on how much water your drink in a short period of time, you could experience a wide variety of symptoms, ranging from a mild headache to impaired breathing. And as occurred recently in the tragic water-drinking contest, it is quite possible to die if you drink enough water in a short enough period of time.
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