The blood turns black as it travels through your digestive system before coming out in your poop How is the cause of melena diagnosed What is melena (black stool)?
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Melena often results from damage to the upper gi tract lining, swollen blood vessels, or bleeding disorders
The most common cause of melena is peptic ulcer disease, in which painful ulcers or sores develop in the stomach or small intestine.
Melena is not a disease itself but rather a symptom of a condition that's causing the bleeding Blood in the stool is never normal, so when melena is present, it is important to see a healthcare provider for an evaluation. Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly 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
Hematochezia and melena are two terms that describe different ways blood can appear in your stool 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. Gastrointestinal (gi) bleeding is usually categorized as either melena or hematochezia
Melena refers to black stools, while hematochezia refers to fresh, red blood in your stool
Melena is blood in your bowel movements This is caused by bleeding in your upper gastrointestinal (gi) system or large bowel Your bowel movements may be black or tarry, and have a foul odor They may also be shiny or sticky
