Rectal prolapse is when the tissue that lines the rectum falls down into or sticks through the anal opening.

Rectal prolapse occurs most often in children under age 6 and in the elderly. It is often associated with the following conditions:

• Pinworms (enterobiasis)
• Whipworm infection (trichuriasis)
• Cystic fibrosis
• Malnutrition and malabsorption (celiac disease is an example)
• Constipation
• Prior injury to the anus or pelvic area

The main symptom is a reddish-colored mass that sticks out from the opening of the anus, especially following a bowel movement. The lining of the rectal tissue may visible and may bleed slightly.

See the individual conditions.