If there is local swelling in the auricular compartment, which is also commonly known as congenital preauricular fistula, it is considered to be a local infection, which leads to a local abscess, which is not self-healing. In this case, the patient first needs to go to the hospital for local incision and drainage, using metronidazole injection for repeated flushing, while local drainage strips are placed and changed twice a day, and when the inflammation subsides, the patient needs to undergo surgery to remove the fistula, the fistula and the blind end to avoid recurrence. The preauricular fistula is a congenital disorder of the ear, a congenital ear disorder caused by dysplasia or incomplete fusion of the first and second gill arches during the embryonic period, usually a small hole is found at the ear screen, when there are no symptoms, the patient does not have any complaints, once local infection or repeated squeezing leads to local swelling and pain, then the next step of treatment is required.