If you have a congenital preauricular fistula, you should pay attention to the following things before and after treatment: 1. The doctor will inform the patient about the pathogenesis of the disease and the various causes of infection; 2. If you have a fistula, you should try to avoid entering the bath water, and if you do, you should dry it in time to keep the skin around it dry to avoid infection; 4. Patients with congenital preauricular fistula, if they have repeated infections, they should be treated with surgery as soon as possible to avoid the formation of abscesses and scarring from repeated infections; 5. Patients with fistula mouths attached or fistula mouths passing through the foot of the ear wheel or cartilage need to have part of the cartilage removed during surgery to prevent The fistula should be treated as early as possible to avoid recurrent infection and scarring.