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A 61-year-old male asked:

Good morning doctors. i had a colonoscopy at the end of last october, 2020..no colon cancer only diverticulosis. lately my stool is dark brown to almost black, but not quite black. what may this be?

1 doctor answer1 doctor weighed in
Dr. Silviu Pasniciuc
Internal Medicine 29 years experience
Diet, meds and non specific bleeding from upper gi tract are commonly involved in changing stool color in black. Not all black stools are due to bleeding and black stools are not diagnostic for specific pathology, such as cancer. Your gastroenterologist or PCP would be best to place your findings in clinical context.
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Last updated Nov 10, 2021


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