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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. [2]
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 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]
Fiber helps with [stool] motility and bulk, which means that it can help support a healthy digestive system,” Lal says. Thibault says that not only do bananas have fiber, but they also have ...
She noticed darker colored blood, rather than bright red blood. When it comes to colon cancer, the color of blood a person sees after a bowel movement depends on where the tumor is located, Chung ...
Sugar can make diarrhea worse because it causes the gut to release a lot of water, resulting in loose stools. Avoid sugary foods and drinks, even those with artificial sweeteners like stevia and ...
This is a result of the peel forming tiny inter-fruit membranes which cause the banana to appear as though it has been sliced before it is peeled. This is generally a result of freezing the fruit, and occurs most commonly in fruit that is sold in large stores or supermarkets.
Eating beetroot can cause harmless red-colored feces because of insufficient metabolism of a red pigment, and is a differential sign that may be mistaken as hematochezia. Consumption of dragon fruit or blackberries may also cause red or black discoloration of the stool and sometimes the urine (pseudohematuria). This too, is a differential sign ...