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Doctor insights on: Can You Get Diarrhea By Drinking Too Much Water

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Dr. Alan Wartenberg
Board Certified, Addiction Medicine
43 years in practice
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Can you get diarrhea by drinking too much water?

Can you get diarrhea by drinking too much water?

Generally no: The body has mechanisms to get rid of the excess water, but under certain conditions - if it is taken in very rapidly or in certain disease states, it can cause water intoxication - diluting the blood so that sodium levels can get very low - if low enough, it can cause seizures, coma and death. Diarrhea rarely occurs, because the water is absorbed in stomach and upper intestine, but it can. ...Read more

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Dr. Mark Pack
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Dr. Oscar Novick
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Loose Stools (Definition)

Loose stools is a symptom in which a person's stool (poop) does not hold its shape after it goes into the toilet. Instead of remaining a shaped piece of poop, the poop spreads out in the toilet bowl water. Very loose stool is called diarrhea. Loose stool can be caused by infections, certain foods or drinks, ...Read more


Dr. Alan Wartenberg
Board Certified, Addiction Medicine
43 years in practice
6M people helped
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Can a person get diarrhea from drinking too much water?

Can a person get diarrhea from drinking too much water?

Not usually: water is absorbed very well from the intestines, and rarely could that capacity be exceeded. When the gut is inflamed by a virus, it interferes with the ability of the gut to absorb solid nutrients, and they will cause diarrhea. The usual treatment is to go to clear liquids, because they are better absorbed. Large amounts of water can dilute the sodium in the bloodstream and cause harm however. ...Read more

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Dr. Mark Pack
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Dr. Joel Gallant
Board Certified, Infectious Disease
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Can i get diarrhea from drinking too much water?

Can i get diarrhea from drinking too much water?

No: The only bad thing you can get from drinking too much water is hyponatremia (diluted blood). But you'd have to drink way too much water to get that. People who drink that much water have 'psychogenic polydipsia, ' which is a nice way of saying that they're nuts. ...Read more

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Dr. Joel Gallant
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Dr. Mark Pack
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Dr. Evan Altman
Board Certified, Psychiatry
13 years in practice
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Can drinking too much water cause diarreah? I drank a lot of water on day and also had very watery diarrhea same day.

Yes: When you drink excessive amounts of water, your body can get overwhelmed & more than usual can bypass the stomach & small intestine and end up in the large intestine. The large intestine resorbs water as the stool makes its way around but if there is a huge amount of water, stool content drawing water to stay in the bowel (osmotic pressure), &/or the movement is quick, then you can get diarrhea. ...Read more

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Dr. Heidi Fowler
Board Certified, Psychiatry
19 years in practice
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Can drinking too much alcohol make you get diarrhea?

Can drinking too much alcohol make you get diarrhea?

For some: Symptoms of alcohol intolerance may include: headache, flushing, hives, nasal congestion, GI upset, nausea/vomiting ; low blood pressure. You could be allergic to alcohol or it's ingredients such as yeast, grains, sulfites, histamines ; other chemicals. ...Read more

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Dr. Brett Kalmowitz
Board Certified, Gastroenterology
16 years in practice
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Dr. James Chapman
Board Certified, Cardiology
35 years in practice
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Is drinking too much milk per day can cause diarrhea?

Is drinking too much milk per day can cause diarrhea?

Yes: Lactose intolerance is very common, and makes it hard to digest milk. You may have a mild form which is only expressed when large amounts of milk are ingested. ...Read more

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Dr. Vivek Huilgol
Board Certified, Gastroenterology
29 years in practice
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Can drinking too much gatorade cause diarrhea?

Probably not: Not a great idea - calories, high fructose, etc. But not likely to cause diarrhea per se... ...Read more

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Dr. James Rotchford
Board Certified, Addiction Medicine
35 years in practice
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My teenage son gets diarrhea every time he runs long distance. What should he do is he drinking too much or too little? Is he over working himself? This is the first time he has run cross country. Fyi

Hard to say: Not a common problem so i can only conjecture. I would suspect the vigorous exercise is disrupting his autonomic system enough that it causes diarrhea. The running and diarrhea can both cause loss of electrolytes so replacement is in order. Besides a simple exam/lab might have him see an acupuncturist for 3 sessions to see if that helped along with more gentle pacing regarding his running. ...Read more

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Dr. Oscar Novick
3,018 doctors shared insights

Diarrhea (Definition)

Diarrhea is a term that describes loose, watery stools occurring more frequently than usual. It is often not due to a serious cause, but severe diarrhea ...Read more


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Dr. Mark Pack
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