A member asked:

I had diarrhoea for 4 days and now my stool is black why is that?

4 doctors weighed in across 3 answers

Black stools: Although this may be the result of something you have eaten it also suggests the probability that you are bleeding somewhere in your GI tract. Please go now and see a gastroenterologist and have this evaluated. Do not wait to see what is happening. This could become severe. Good luck and hope you are better soon.

Answered 6/10/2014

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Dr. John Munshower answered

Specializes in Family Medicine

HMMM: I do not know, but a black stool could mean blood was in the stool. Best to have a black stool evaluated if it persists.

Answered 3/31/2014

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Dr. Robert Killian answered

Specializes in General Practice

Pepto Bismal: Your stool is black because you used pepto bismal. You do not have a GI bleed and do not need to see a physician about this.

Answered 6/10/2014

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