Black poop can be caused by foods or medications. Stool may also be black becasue of blood in the digestive tract, known as melena. A small drop of red blood is usually due to minor hemorrhoids but ...

Bleeding in the gastrointestinal tract and colon cancer can cause black poop (also known as melena). But black stool doesn't always mean there is an underlying health concern. Dark-colored foods, iron ...

Diarrhea is a common symptom of various medical conditions. It involves having loose, watery stools three or more times per day. Acute, or short-term, diarrhea usually lasts for a couple of days.