10 Stomach Ulcer Symptoms
Reviewed: Dr. Gromatzky
Symptom #5: Dark Stools
Dark, tarry stools can be a sign of a bleeding stomach ulcer. The intermittent pain caused by a peptic ulcer occurs when acid washes over the sore area. As this happens, the acid continues to burn into the lining of the stomach, leading to deepening of the wound until it reaches blood vessels.
Once the wound reaches blood vessels, the ulcer begins to bleed. By the time the blood makes it through the digestive system and is being excreted with feces, it has taken on the dark, tarry color.
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