Definition of Rectal prolapse:

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

Causes, incidence, and risk factors:

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