The abscess behind the ear may be caused by sebaceous cyst with infection, gill slit cyst and gill slit fistula with infection, tuberculosis of lymph nodes behind the ear, etc. Oral medication, local disinfection, incision and drainage, surgical excision and other treatments are feasible. 1. Sebaceous cyst with infection: small pustules can be sterilized with iodophor. However, if the abscess protrudes and has obvious fluctuating sensation, incision and drainage are usually needed, and the cyst is removed completely and timely after infection control to avoid recurrence. 2. Gill slit cyst and gill slit fistula with infection: bacterial infection can be treated with antibiotics such as cefradine. If the abscess is large, surgical incision and drainage can be performed under the rational use of sensitive antibiotics. After effective control of inflammation, you can choose to surgically remove the cyst and fistula. 3. Lymph node tuberculosis: isoniazid, rifampicin, pyrazinamide, ethambutol and other drugs can be used in combination, and the function of liver and kidney should be monitored regularly during the treatment. It is recommended that patients consult a doctor in time to check the cause of the disease, and actively cooperate with the physician to treat the disease, the above drugs should be used in accordance with the doctor’s instructions.