A 35-year-old member asked:
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could impacted stool in large colon and rectum cause black stools?

1 doctor answer
Dr. Barry Marged
43 years experience Family Medicine
Not likely: From the standpoint of the medical profession, black stools -called melena - are always assumed to be blood. Usually representing bleeding from stomach or "higher up" within the intestines. Colon bleeding usually is red. Unfortunately, bismouth containing medications can also cause black stool, but even with that type of product, one cannot be sure there is not bleeding also. Needs evaluation.
Answered on Feb 21, 2019
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Ulcerative colitis: The findings you described are consistent with your diagnosis of ulcerative colitis. Wish you good health!

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