.G.I. tract bleed: Black stools typically are from stomach/esophageal bleeding. When blood mixes with the stomach acid, it causes a chemical reaction, turning the blood black. Bleeding below the stomach (hence less/no acid exposure ypically causes red or burgundy stools. You should see a doctor and have your hemoglobin level checked.
Answered 6/19/2015
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A doctor has provided 1 answer
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