A member asked:

Having several very dark bms daily. sometimes urgent/painful + often there's undigested food. not eating extra iron/dark foods. what causes dark stool?

A doctor has provided 1 answer

Very dark stools: Very dark stools can be due to blood. Also pepto bismol (bismuth subsalicylate) will cause dark stools. See your physician if the symptoms are persisting.

Answered 9/13/2017

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