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A member asked:
I have a black and tarry stool. at the same time i have a constipation; but after endoscopy i don't have an ulcer. what is the main reason to have a black stool and constipation if not an ulcer?
A doctor has provided 1 answer
See below: Generally black tarry stool indicates upper gastrointestinal bleeding. Iron supplements and bismuth subsalicylate(Pepto-Bismal) can also turn stool black, although usually not tarry. If the endoscopy was normal you may be bleeding from the small intestine from Vascular anomalies( Angiodysplasia). Special studies are needed to diagnose these. Speak with your GI specialist.
Answered 12/22/2015
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