The common causes of rectal bleeding
- Anal fissure
- Hemorrhoids
- Diverticulosis
- Colon cancer and polyps
- Colonic polyp removal
- Angiodysplasias
- Colitis
- Proctitis
- Meckel's diverticula
- Uc crohn
Associated symptom:
Bleeding from your colon (large intestine) or rectum will be bright red
But it may only be from an anal fissure (tear) or internal hemorrhoid
If you have pain in your rectum or anus upon defecating, then it’s likely you have a fissure that’s getting torn open by the bowel movement, causing bloody stools.
If you don’t have any pain (or only mild pain) but find yourself straining to have even a soft bowel movement - or if you have your bowel movement and there’s no blood in the stool, but at the end there’s half a teaspoon to a couple tablespoons of blood - it’s likely you have an internal hemorrhoid.
Unlike external hemorrhoids, internal hemorrhoids rarely hurt.
With internal hemorrhoids, you may also feel a pressure in your rectum, followed by a gush of blood. You may also feel a" popping" sensation before the blood appears.
Rectal bleeding also may be seen with bleeding that is coming from higher in the instestinal tract, from the stomach, duodenum, or small intestine.
Rectal bleeding may not be painful; however, other symptoms that may accompany rectal bleeding are diarrhea, and abdominal cramps due to the blood in the stool.
Diagnosis of cause:
Origin of rectal bleeding is determined by history and physical examination, anoscopy, flexible sigmoidoscopy, colonoscopy, radionuclide scans, visceral angiograms, flexible endoscopy or capsule endoscopy of the small intestine, and blood tests.
Managed
Rectal bleeding is managed first by correcting the low blood volume and anemia if present with blood transfusions and then, determining the site and cause of the bleeding, stopping the bleeding, and preventing future rebleeding.
Prevention
Rectal bleeding can be prevented if the cause of the bleeding can be found and definitively treated, for example, by removing the bleeding polyp or tumor.
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