Surgery is a highly effective treatment for a fissure and recurrence rates after surgery are low. Surgery usually consists of a small operation to cut a portion of the internal anal sphincter muscle (a lateral internal sphincterotomy). This helps the fissure heal and decreases pain and spasm.

If a sentinel pile is present, it too may be removed to promote healing of the fissure. A sphincterotomy rarely interferes with one’s ability to control bowel movements and is most commonly performed as a short outpatient procedure. Surgical treatments do have other risks, and your surgeon will address these with you.