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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.
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]
A complete blood count as well as an hemoglobin test should be performed when a patient presents symptoms of hematochezia. A colonoscopy may be necessary if there is suspicion of bleed from colon particularly in the elderly to look for the site and many causes of bleed like carcinoma, ulcerative colitis, rectal varices or other lesions and in certain instances upper gastrointestinal endoscopy ...
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 ...
Blood in stool: Red flags There are some symptoms that raise suspicion when they accompany blood in the stool, Dr. Bulsiewicz points out. These can include multiple bowel movements in a row with ...
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. 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]
of or pertaining to the veins, venous blood, and the vascular system: Latin vēna, blood-vessel, vein venule, venospasm: ventr(o)-of or pertaining to the belly, the stomach cavities Latin venter, belly, stomach, womb ventrodorsal: ventricul(o)-of or pertaining to the ventricles; any hollow region inside an organ
Blood can change the color as well.” Basically, there’s a lot that can lead to the overall appearance of your poop. As for its odor…it’s normal to have poop that stinks.