Cautery is then used to unroof the fistula tract in its entirety over the probe. With the probe removed, care is taken to cauterize the entire lining of the tract to prevent recurrence.
Patients are instructed to undergo Sitz baths after every bowel movement for up to two weeks. Oral narcotics may be necessary for the first day or so. Recurrence is uncommon and is usually associated with a complex fistula tract. Multiple fistulas or recurrent fistulas require a more thorough search for other pathology such as Crohn's disease, ulcerative colitis (in children) or AIDS.
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