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The bleeding may result in bright red blood in the stool as well as maroon colored or black stool. The bleeding also may be occult (not visible with the human eye). The common causes of rectal bleeding from the colon include anal fissure, hemorrhoids, diverticulosis, colon cancer and polyps, colonic polyp removal, angiodysplasias, colitis, proctitis, and Meckel's diverticula.
At other times it may visible on toilet tissue or in the toilet after a bowel movement as bright red blood. Bleeding that happens higher up in the digestive tract may make stool appear black and ...
Constipation and straining to pass a large bowel movement can lead to smears of bright red blood on the toilet paper. Not drinking enough water, low-fiber diets and a lack of exercise can lead to constipation. Let your doctor know if you are straining to pass bowel movements.
Bright Red Blood In Stool Causes. The condition is called rectal bleeding since the rectum (the last 15 cm of the colon or large intestine) lies just above the anus. However, the blood could not only originate from the rectum but can also come from other parts of the gastrointestinal system such as the esophagus, stomach, small intestine, and the large intestine.
The blood seen can range from bright red brisk bleeding, to dark blood mixed with faeces, to black- or plum-coloured faeces (melaena). An angiodysplasia may also cause non-visible (occult) blood loss (see below).
If your stool is bright red or a darker, maroon color, you could be passing blood clots in your stool. The appearance of blood clots in your stool is often a sign of bleeding from the colon.
Hemosuccus pancreaticus, also known as pseudohematobilia or Wirsungorrhage is a rare cause of hemorrhage in the gastrointestinal tract. It is caused by a bleeding source in the pancreas, pancreatic duct, or structures adjacent to the pancreas, such as the splenic artery, that bleed into the pancreatic duct, which is connected with the bowel at the duodenum, the first part of the small intestine. Patients with hemosuccus may develop symptoms of gastrointestinal hemorrhage, such as blood in the stools, maroon stools, or melena, which is a dark, tarry stool caused by digestion of red blood cells. They may also develop abdominal pain. It is associated with pancreatitis, pancreatic cancer and aneurysms of the splenic artery. Hemosuccus may be identified with endoscopy (esophagogastroduodenoscopy), where fresh blood may be seen from the pancreatic duct. Alternatively, angiography may be used to inject the celiac axis to determine the blood vessel that is bleeding. This may also be used to treat hemosuccus, as embolization of the end vessel may terminate the hemorrhage. However, a distal pancreatectomy—surgery to removal of the tail of the pancreas—may be required to stop the hemorrhage.
Intussusception is a medical condition in which a part of the intestine folds into the section next to it. It typically involves the small bowel and less commonly the large bowel. Symptoms include abdominal pain which may come and go, vomiting, abdominal bloating, and bloody stool. It often results in a small bowel obstruction. Other complications may include peritonitis or bowel perforation. The cause in children is typically unknown; in adults a lead point is sometimes present. Risk factors in children include certain infections, diseases like cystic fibrosis, and intestinal polyps. Risk factors in adults include endometriosis, bowel adhesions, and intestinal tumors. Diagnosis is often supported by medical imaging. In children, ultrasound is preferred while in adults a CT scan is preferred. Intussusception is an emergency requiring rapid treatment. Treatment in children is typically by an enema with surgery used if this is not successful. Dexamethasone may decrease the risk of another episode. In adults, surgical removal of part of the bowel is more often required. Intussusception occurs more commonly in children than adults. In children, males are more often affected than females. The usual age of occurrence is six to eighteen months old.
Hematochezia is the passage of fresh blood through the anus, usually in or with stools (contrast with melena). The term is from Greek αἷμα ("blood") and χέζειν ("to defaecate"). Hematochezia is commonly associated with lower gastrointestinal bleeding, but may also occur from a brisk upper gastrointestinal bleed. The difference between hematochezia and rectorrhagia is that, in the latter, rectal bleeding is not associated with defecation; instead, it is associated with expulsion of fresh bright red blood without stools. The phrase bright red blood per rectum (BRBPR) is associated with hematochezia and rectorrhagia.