Melena is when blood causes stools to appear black, tarry, and foul-smelling. The blood is dark because it is coming from somewhere in the upper digestive system, including the esophagus (food ...

There are three key symptoms of colon cancer you should know, according to Cann. And while some have a more obvious ...

A person’s poop may be black due to eating certain foods, such as licorice, taking iron supplements, or gastrointestinal bleeding. If people have blood in the stool, they may benefit from ...