Diarrhea means having a loose, watery stool when you have a bowel movement (poop).From causes to prevention, get the basics on diarrhea from the experts at WebMD.

Diarrhea can deplete lactase, sometimes severely, lowering your ability to digest milk and other dairy. This, in turn, can lead to diarrhea, gas, nausea, and bloating.

Paradoxical diarrhea happens when loose, watery stool finds a way around hardened, impacted stool in your colon and leaks from your anus. Also called overflow diarrhea, it’s often a symptom of a ...

Occasional baby diarrhea is very common. Here's what may be causing it, how to treat it, and when to talk to your baby's doctor.

Ulcers, IBS, kidney stones and even appendicitis are all well-known causes of at times severe stomach cramping or pain. Colitis is another medical condition that can be behind intestinal discomfort, ...

Some foods can make diarrhea worse, and others can keep you nourished while you’re getting better. Learn what to eat and drink to get through a bout of diarrhea. Occasional diarrhea is nothing ...