A member asked:

What could cause black (not tar-like) or very dark stool with excessive gas after a bowel movement?

A doctor has provided 1 answer
Dr. Steven Warren answered

Specializes in Family Medicine

Food or medicine: are you taking medication like peptobismol which will turn stool dark or black If you have not enough acid iin your stomach then you may not digest food properly and you will have a change in bowels as well as increase in gas Watch what you are eating and maybe do a day of just clear liquids to help it repair

Answered 8/21/2016

3.4k views

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