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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.
Other names: Upper gastrointestinal hemorrhage, gastrorrhagia: Endoscopic image of a posterior wall duodenal ulcer with a clean base, which is a common cause of upper gastrointestinal hemorrhage. Specialty: Gastroenterology: Symptoms: Hematemesis (vomiting blood), coffee ground vomiting, melena, hematochezia (maroon-coloured stool) in severe cases
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]
Just because your stool happens to come out some other color doesn’t mean you’re dealing with a serious condition. When black poop happens, family practitioners like Christine Traxler, MD, and ...
It is also one of the medications that can cause toxic epidermal necrolysis or Stevens–Johnson syndrome. [8] The pediatric version of cefdinir can bind to iron in the digestive tract; in rare cases, this causes rust or red discoloration of the stool. Blood typically appears dark brown or black in stool, and testing may confirm which is present.
If your stools are regularly much thinner than before, this may suggest a tumor in the colon, Inra said. Watch for other changes in your bowel habits, like constipation. 5.
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]
Stomach pain or tummy troubles are among the most common ailments that affect children and adults alike. Feelings of bloating, cramping, constipation or nausea often occur because of something ...