Sebaceous cysts are relatively small when they are not ruptured, but when they are ruptured and infected, they become larger in size and have inflammatory symptoms of redness, swelling, heat and pain. Sebaceous cyst is the sebum secreted by the sebum is not easy to discharge from the body, but in the subcutaneous gathering to form a cystic encapsulation of the mass, hard, easy to rupture the wall of the capsule and the formation of infection in the subcutaneous. Normal non-infected sebaceous cysts are hard, small in size and painless when pressed, then surgical excision can be considered. Sebaceous cysts are prone to infection, when the volume of infection becomes significantly larger, high skin temperature, redness of the skin around the cyst, it is recommended that erythromycin ointment for external use, oral cephalosporin or amoxicillin and other antibiotics to fight infection, the volume of the infection corrected will gradually become smaller. Sebaceous cysts, need to actively seek medical advice, follow the doctor’s instructions reasonable treatment, drugs need to be under the guidance of a physician reasonable application, so as not to delay the condition.