The lumps behind the ear are considered to be caused by folliculitis, boils, sebaceous cysts and other diseases, which need to be treated with medication and surgery. 1. Folliculitis: the pain of pressing the lump at the back of the ear is considered to be caused by folliculitis. Patients can take oral antibiotics as prescribed by the doctor, such as cefuroxime, doxycycline, etc., or topical mupirocin ointment, fusidic acid ointment. 2. Boils: Boils are also considered to be the cause of pain when pressed at the root of the back of the ear. Patients can follow the doctor’s instructions to use ichthyol ointment, tincture of iodine, or oral cefuroxime, amoxicillin and other antibiotics. For pus-filled boils, local abscess incision can be taken. 3. Sebaceous cysts: The lumps behind the ear may be caused by sebaceous cysts. For smaller cysts, a small incision can be made directly. For patients with larger cysts, cyst removal is required. There are many reasons why the lump behind the ear hurts when pressed, and patients need to find out the cause of the problem. Once diagnosed, the patient should cooperate with the doctor to take relevant treatment measures.