Anal fissure

An anal fissure is a small cut or tears 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. An anal fissure most often occurs when passing large or hard stools. Chronic constipation or frequent diarrhea can also tear the skin around your anus.


  • ulcerative colitis
  • lateral sphincterotomy
  • Anal dilation
  • Epidemiology

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