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 ...
Common causes of black poop include dark-colored foods and certain medications. Bleeding in the upper GI tract may cause black, tarry, foul-smelling stool. Seeing a doctor if you have unexplained ...