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A member asked:
Had yellow stool for almost 4months with no other symptoms,it turned to dark green 3days ago,no iron supplements should i worry ?
A doctor has provided 1 answer
Define melena: Melena, by definition, is passage of dark stools stained with denatured blood. As we established in prior healthtap answers, all dark stool is not melena. Your doctor, or even an over-the-counter test that you can purchase, can check to see if your dark stool contains blood. Needed is for you to provide a sample of the dark stool. False positive results can occur based on diet & stool additives.
Answered 4/12/2016
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