What the Color and Consistency of Your Poop Says About You
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Black, Tarry Stools and Onset of Hematemesis: Case Presentation
Bloody or tarry stools Information | Mount Sinai - New York
What Your Poop Color Says About Your Health
Dr. Narula Gastroenterology - In medicine, melena refers to the black "tarry" stool that are associated with upper gastrointestinal bleeding. The black color is caused by the hemoglobin in the blood being