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A member asked:

What causes black tarry stools, i always heard it was cancer?

A doctor has provided 1 answer

Bleeding in GI: Bleeding in the intestine causes black tarry stools. It could be bleeding from ulcers in the stomach, duodenum, vascular malformation of cancer in the GI tract. In any case, you should consult your doctor for a proper evaluation.

Dr Ali and another doctor agreed

Answered 6/10/2014

5.6k views

Thank

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Is it good to remove remaining stool with finger? Will this cause cancer? I am worried

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Can you provide an exhaustive list of all possible causes of crescent-shaped thin stool (excl. Rectal cancer b/c i just had lar a month ago)?

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Mostly brown stool, but there's black mixed with it. Apparently this is not normal. Could it mean blood? Black is all over stool. Normal size. Cancer?

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I am16yearsoldand I have a yellow stool for aboutamonth now I am worried that I have cancer. What is the most likely cause. my momthinks imahypochon?

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