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. 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.
Anal Fissure: Symptoms, Causes, Diagnosis, and Treatment
An anal fissure is a small cut or tear in the lining of the anus. The crack in the skin causes severe pain and some bright red bleeding during and after bowel movements. At times, the fissure can be deep enough to expose the muscle tissue underneath. In most cases, the tear heals on its own within four to six weeks.
The anal canal is a short tube surrounded by muscle at the end of your rectum. The rectum is the bottom section of your colon large intestine. An anal fissure also called fissure-in-ano is a small rip or tear in the lining of the anal canal. Fissures are common, but are often confused with other anal conditions, such as hemorrhoids. Fissures are usually caused by trauma to the inner lining of the anus from a bowel movement or other stretching of the anal canal.
NCBI Bookshelf. Brian Jahnny ; John V. Authors Brian Jahnny 1 ; John V. Ashurst 2. In most cases, anal fissures are a result of hard stools or constipation, as well as injury.