You may lose weight when you have diarrhea or loose, watery stool as a result of lost fluid. But you also can experience an unintentional and rapid weight gain with diarrhea. Causes of weight gain and ...

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 type ...