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Melena (black stool) is a symptom of internal bleeding, usually in your upper gastrointestinal (gi) tract The black color of melena is caused by blood that has been exposed for several hours to stomach acid and enzymes and to bacteria that normally reside in the large intestine. The blood turns black as it travels through your digestive system before coming out in your poop.
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Hematochezia and melena are two terms that describe different ways blood can appear in your stool Melena is more likely when bleeding comes from the esophagus, stomach, or small intestine Hematochezia is bright red blood that generally starts lower in the digestive tract
Melena generally starts much higher up in the digestive tract and results in black, tarry stools.
Melena refers to black, tarry, sticky stools and usually results from upper gastrointestinal bleeding The source of bleeding can come from damage to the lining of the gi tract, breakage of swollen blood vessels, or other conditions that prolong bleeding such as hemophilia. See a healthcare provider when melena is present, as blood in the stool is never normal. Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly associated with upper gastrointestinal bleeding
[1] the black color and characteristic strong odor are caused by hemoglobin in the blood being altered by digestive enzymes and intestinal bacteria. Possible causes, signs and symptoms, standard treatment options and means of care and support. Bleeding in the gastrointestinal tract and colon cancer can cause black poop (also known as melena) But black stool doesn't always mean there is an underlying health concern.
Learn about common causes such as ulcers, gastritis, esophageal varices, stomach cancer, and medications, plus symptoms, risks, and when medical care is needed
Black or tarry stools with a foul smell are a sign of a problem in the upper digestive tract It most often indicates that there is bleeding in the esophagus, stomach, or first part of the small intestine The term melena is used to describe this finding.
