• MEDICAL CONDITION
Anal fissure

Anal fissure

Synonyms: Rectal fissure

DESCRIPTION

An anal fissure is a small split or tear in the thin moist tissue (mucosa) lining the lower rectum (anus).

Anal fissures are very common in young infants, but may occur at any age. The rate of anal fissures drops with age. Fissures are much less common among school-aged children than infants.

In adults, fissures may be caused by passing large, hard stools, or by having diarrhea for a long time.

Anal fissures are also common in women after childbirth and in persons with Crohn's disease.

Anal fissures may cause painful bowel movements and bleeding. There may be blood on the outside of the stool or on the toilet tissue (or baby wipes) after a bowel movement.

Symptoms may begin suddenly or develop slowly over time.

www.nlm.nih.gov/medlineplus