Preauricular fistula, familiarly known as “pale ear”, appears unilaterally or bilaterally after birth, and genetic studies suggest that it is inherited autosomal dominantly in bilateral cases, while unilateral cases are mostly caused by natural mutations. Intermittent discharge of white discharge, which may have an odor; or recurrent redness, swelling, and pus flow near the foramen magnum; local scar formation, etc. Inflammation can be treated by incision and pus drainage and drug exchange, and can be healed locally, but it is prone to recurrence. Asymptomatic people can be left untreated. For those with local itching and discharge, surgical excision is recommended. If the infection is not well controlled for a week, abscess formation should be promptly incised and drained, and fistulotomy should be performed early after the inflammation subsides. It is important to remove the fistula tissue completely, and since the fistula tissue is mostly adherent to the cartilage of the ear wheel, some of the cartilage needs to be removed to prevent recurrence. 1. In children, the procedure is mostly performed under general anesthesia. After satisfactory anesthesia, a blunt needle can be used to inject methylene blue into the fistula as a tracer, make a pike incision at the fistula, extend it in the direction of the foot of the ear, separate it in the direction of the traced fistula, remove the fistula completely and remove a small amount of cartilage from the foot of the ear; for the foci of infection, those with mild inflammation are left to heal on their own; those with significant granulomatous growth and local inflammatory reaction to the foci of infection can be removed together. 2. Keep the area clean and do not squeeze hard. Congenital auricular fistula with a history of infection is an indication for surgery, but there is no clear risk factor for individual variability in when the infection occurs.