The causes are the same as completely black stool—it could be from something harmless you ate or a small amount of melena. If ...

Discover the top causes of black poop like diet, supplements, and gut health conditions, plus the best treatment options ...

Polyps are small growths that form in the large intestine ... this can cause bleeding which may make the stool black and tarry. If a doctor thinks that medications are causing stomach ulcers ...