Many things: Depending on where the bleeding is coming from (ie the upper GI tract, or the lower GI tract) it can be an ulcer, polyp, cancer, inflammation, or sometime the source is never found. All GI bleeding should be worked up, and you need to speak to your doctor.
Answered 2/18/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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