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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.
Dark foods like beets, blueberries, dark licorice, and even a lot of spinach can cause your poop to look black, Dr. Farhadi says. “Dark foods contain certain dyes which can turn the food red or ...
Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] 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]
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. ... If your poop is black, sticky ...
For instance, Pepto Bismol can temporarily turn stools black, as can iron supplements. If you don’t think your green stool is the result of your diet, schedule a visit with your doctor to ...
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]
Bloody diarrhea, abdominal pain, fever [1] [2] Complications: Dehydration [3] Duration: Less than a week [4] Causes: Usually Shigella or Entamoeba histolytica [1] Risk factors: Contamination of food and water with feces due to poor sanitation [5] Diagnostic method: Based on symptoms, Stool test: Prevention: Hand washing, food safety [4] Treatment
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