7 doctors weighed in:
How to tell if I have melena?
7 doctors weighed in

Dr. Charles Cattano
Internal Medicine - Gastroenterology
6 doctors agree
In brief: 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.

In brief: 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.
Dr. Charles Cattano
Dr. Charles Cattano
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