Preauricular fistula surgery is a relatively common procedure in otology and can be scheduled under general anesthesia if the patient is young. Surgery is often recommended because an infection has formed in the preauricular fistula and requires repeated anti-inflammatory treatment, but adults may consider surgery under local anesthesia. There are many branches of the preauricular fistula, which are difficult to remove completely and completely, and there is a high chance of recurrence, so patients must be prepared before having surgery. The preauricular fistula grows like a tree root and has many branches, which must be removed as much as possible within the field of vision that can be seen, and preauricular fistula surgery is indeed a surgery with a higher chance of recurrence.