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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.
“The tarry or stickiness of the stool and the smell are what differentiate true GI bleeding from other causes such as iron supplements, dark foods, and bismuth-containing medications,” he adds.
Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18] A number of foods and medications can turn the stool either red or black in the absence of bleeding. [2] Bismuth found in many antacids may turn stools black as may activated charcoal. [2]
Blood may be observed in vomit or in altered form as black stool. Depending on the amount of the blood loss, symptoms may include shock. Upper gastrointestinal bleeding can be caused by peptic ulcers, gastric erosions, esophageal varices, and rarer causes such as gastric cancer.
Gastroenterologists explain the most common causes of foul-smelling stool, like changes in gut bacteria, food allergies, celiac disease, IBD, and malabsorption. Smelly Poop Is NBD Unless You Have ...
If you have blood in your stool or black stool, abdominal pain, weight loss or fever, talk to your doctor immediately, Dr. Forman says. Everyone should start getting screened for colon cancer at ...
Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
Discussing the types of poop may seem disgusting or at least embarrassing, but paying attention to what’s coming out of you can give you great insight into your health. A bowel movement is the ...
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