Patient's question:
There is a small hole near the ear, which occasionally smells bad and oozes pus.Doctor's answer:
This is the manifestation of a preauricular fistula. Congenital preauricular fistula is a common otological disease. It is caused by the failure of fusion of the small papillary nodules formed by the first and second pharyngeal arches during the embryonic period, or incomplete closure of the first pharyngeal groove.