In a new Health survey, a third of adults in the U.S. said they had poop abnormalities in the last month. Here's what they're ...

Blood in stool may result from bleeding in the upper or lower GI tract — and the color of the blood can help indicate its source. Black, tarry stool Black, tarry stool may point to a bleed in ...

Medically reviewed by Robert Burakoff, MD Black poop can be harmless, caused by certain foods or medications, or it can be a sign of melena, meaning there’s blood in your stool. Melena happens ...