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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]
Human feces photographed in a toilet, shortly after defecation.. Human feces (American English) or faeces (British English), commonly and in medical literature more often called stool, [1] are the solid or semisolid remains of food that could not be digested or absorbed in the small intestine of humans, but has been further broken down by bacteria in the large intestine.
Last year, sexual-health experts named anal pleasure the next great frontier sexual exploration.And while it’s great that many folks are familiar with (or getting familiar with) tricks and toys ...
Here's what bacterial meningitis is, how it's different from viral and other types of meningitis, and what treatment can be expected.
A common cause is engaging in anal sex with partner(s) infected with sexual transmitted diseases in men who have sex with men. [3] [4] Shared enema usage has been shown to facilitate the spread of Lymphogranuloma venereum proctitis. [5]
Managing crowds has long been a challenge at the Kumbh Mela festivals. In 2013, a stampede at a railway station left 42 people dead and 45 injured as thousands of pilgrims arrived for the festival.
Dieulafoy's lesion often do not cause symptoms (asymptomatic). When present, symptoms usually relate to painless bleeding, with vomiting blood ( hematemesis ) and/or black stools ( melena ). [ 3 ] Less often, Dieulafoy's lesions may cause rectal bleeding ( hematochezia ), or rarely, iron deficiency anemia .