Certain foods and medicines can cause black stool. Sometimes, black stool may even signal bleeding in the digestive tract.

A blood clot can also form in the main blood vessel ... You may also feel fatigued and have dark, tarry stools. Doctors treat ulcers and prevent new ones from forming with medicines that curb ...

Milwaukee Bucks player Damian Lillard was diagnosed with deep vein thrombosis (DVT), a blood clot in his right calf, which is a serious condition but often treatable. Treatment typically involves ...