Get checked: Dark black melena stools are signs of a stomach bleed. Acid reflux can cause nausea and sour taste in mouth mostly when lying flat, but more concerning is that the stomach ulcer may be bleeding if the dark stools continue.
Answered 3/22/2015
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2 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
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