Note after preauricular fistula surgery: 1. Keep the surgical site clean and not wet. 2. Do not squeeze the wound to prevent it from getting infected or splitting. 3, Surgery with cartilage removal at least 1 week after surgery infusion to prevent incision infection. 4. Since the surgery is a tension incision, do not rush to remove the stitches after the surgery and keep in mind the date of the follow-up visit as explained by the surgeon, otherwise the incision is very prone to splitting. 5. There is a possibility of recurrence of preauricular fistula surgery, so if there is redness or swelling in the incision after surgery, you need to follow up promptly.