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Hematochezia is a form of blood in stool, in which fresh blood passes through the anus while defecating. It differs from melena, which commonly refers to blood in stool originating from upper gastrointestinal bleeding (UGIB). [1] The term derives from Greek αἷμα ("blood") and χέζειν ("to defaecate").
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]
These can include multiple bowel movements in a row with fresh blood and unexplained weight loss. Feelings of light-headedness, weakness, or a racing heart could also suggest you are losing more ...
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]
Those with rectal bleeding may notice bright red blood in their stool. Symptoms associated with rectal bleeding include having several bowel movements in a day, feelings of incomplete rectal evacuation, straining, hard or lumpy stools, feelings of urgency, loose or watery stools, and leakage of bowel movement. [2]
The presence of fresh blood in the terminal ileum is presumed to indicate a non colonic source of bleeding. The overall complication rate of colonoscopy in acute lower GI bleeding is 1.3%. Bowel preparation is safe and well tolerated in most patients. The complication rate of colonoscopy in an unprepped colon may be higher.
Casandra Costley thought rectal bleeding, pain was because of a hemorrhoid. She was diagnosed with Stage 4 colon cancer. Trying to educate others on social media.
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.