Patients with a mass behind the ear and painful, usually caused by secondary infection of the postauricular cyst, no inflammation when the mass is painless on pressure, movable, soft to the touch, small at first, about the size of rice grains, mung bean size, can gradually grow. Infection of the postauricular mass is mostly caused by repeated stimulation of the mass, so in order to reduce the occurrence of infection of the postauricular mass, the stimulation of the mass needs to be reduced. Patients with a pack behind the ear, a press on the pain, need to give local iodophor rub, can take oral antibiotics, such as cefprozil, amoxicillin clavulanic acid potassium, the treatment course is generally a week. If the effect is not good after treatment, intravenous antibiotics, such as penicillin, can be given. After the inflammation is controlled, a mass excision is required to reduce future recurrent inflammatory episodes.