This year-old man presented with a very painful infection. There was a large abscess which was easily palpable with surrounding cellulitis. It clearly needed incision so he was admitted for this to be done under general anaesthetic. There was no obvious underlying cause, such as inflammatory bowel disease or diabetes.
An anal fissure is a narrow tear that extends from the muscles that control the anus sphincters up into the anal canal. These tears usually develop when anal tissue is damaged during a hard bowel movement or when higher-than-normal tension develops in the anal sphincters. An anal fistula is a tubelike passage tract from the anal canal to a hole in the skin near the anus. This may occur after rectal surgery, after an abscess in the rectal area, or as a complication of a bowel disease.
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An anal fissure is a tear in the lining of the lower rectum anal canal that causes pain during bowel movements. Anal fissures don't lead to more serious problems. Most anal fissures heal with home treatment after a few days or weeks.