If you've ever answered nature's call and encountered a mysterious, unexpected shade of green, you're not alone. But what does it mean if your poop is green? While green poop is often due to dietary ...

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 ...