Rectal bleeding may occur for many reasons. Common causes of rectal bleeding include:

  1. Anal fissure (tear in the skin of the anus)
  2. Chronic constipation
  3. Hard stools
  4. Hemorrhoids

Less common causes of rectal bleeding:

  1. Anal cancer
  2. Angiodysplasia (abnormalities in the blood vessels near the intestines)
  3. Colon cancer
  4. Colon polyps
  5. Crohn's disease
  6. Diarrhea
  7. Diverticulosis (a bulging pouch that forms on the wall of the intestine)
  8. Ischemic colitis (colon inflammation caused by reduced blood flow)
  9. Proctitis (inflammation of the rectum)
  10. Pseudomembranous colitis (colon inflammation caused by an infection)
  11. Radiation therapy
  12. Rectal prolapse (part of the rectum protrudes through the anus)
  13. Solitary rectal ulcer syndrome (a sore on the wall of the rectum)
  14. Ulcerative colitis

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Sep. 03, 2014