What is an anal fissure?
An anal fissure is a tear in the lining of the anus or anal canal (the opening through which stool passes out of the body). The fissure can be painful and may bleed.
Who is at risk for anal fissures?
Anal fissures can occur in anyone at any age. The chance of having an anal fissure decreases as people get older. People who have had fissures in the past are more likely to have them in the future.
What causes an anal fissure?
Anal fissures can be caused by trauma to the anus and anal canal. The trauma can be caused by one or more of the following:
- Chronic (long-term) constipation
- Straining to have a bowel movement, especially if the stool is large, hard and/or dry
- Prolonged diarrhea
- Anal sex, anal stretching
- Insertion of foreign objects into the anus
Causes other than trauma include:
Anal fissures are also common in young infants and in women after childbirth.
What are the signs and symptoms of an anal fissure?
Signs and symptoms of an anal fissure include:
- Pain during, and even hours after, a bowel movement
- Blood on the outside surface of the stool
- Blood on toilet tissue or wipes
- A visible crack or tear in the anus or anal canal
- Burning and itching that may be painful
- Discomfort when urinating, frequent urination, or inability to urinate
- Foul-smelling discharge
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