Powdery mildew, also known as sebaceous cysts, sebaceous cysts, topical medication can not make the cysts eliminated, the key to the root cause of the disease lies in the complete surgical removal of the cysts. The cause of sebaceous cysts is relatively clear, it is the sebaceous gland ducts are blocked, the secretion can not be discharged in time. If sebaceous cysts are combined with infections, it is recommended to give antibiotic drugs, such as ceftazidime, amoxicillin, etc., which have the effect of inhibiting or killing bacteria. Patients with small cysts may not have any obvious symptoms. If the cysts gradually increase in size, they can be raised on the surface of the skin and may cause pain when pressed. If combined with infection, it may cause redness, swelling and pus. If the cyst is protruding from the skin surface, the cyst will be completely removed by cystectomy if necessary to keep the skin as beautiful as possible. Sebaceous cysts with associated symptoms, such as localized redness, swelling and pain, broken pus, it is recommended to consult the dermatology department of the hospital in a timely manner, and if necessary, consider surgical excision treatment. The drugs mentioned above should be used in accordance with medical advice.