Anal Fissure | ASCRS - Anal disease fissure
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An anal fissure is a small tear in the thin, moist tissue (mucosa) that lines the anus. An anal fissure may occur when you pass hard or large stools during a bowel movement. Anal fissures typically cause pain and bleeding with bowel movements. A chronic anal fissure likely has a deeper tear, and may have internal is more likely to be a sign of another disorder, such as Crohn's disease.