Melena - Wikipedia
https://en.wikipedia.org/wiki/Melena
Melena or melaena refers to the dark black, tarry feces that are associated with upper gastrointestinal bleeding. The black color and characteristic strong odor are caused by hemoglobin in the blood being altered by digestive enzymes and intestinal bacteria. Iron supplements may cause a grayish-black stool that should be distinguished from melena, as should black coloration caused by a number of medications, such as bismuth subsalicylate (the a… Other names: Melaena, melæna Symptoms: Dark blood in stool picture
Other names: Melaena, melæna
Symptoms: Dark blood in stool
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