Powdery mildew is the common name for sebaceous cysts, the treatment of which is based on surgical treatment, and physical therapy if necessary, and generally can not be eliminated by drug treatment, but when the cysts are complicated by infection, the use of fusidic acid ointment, clindamycin ointment, and other drugs can be used under the guidance of the doctor for anti-infection treatment. Sebaceous cysts are mostly formed due to the accumulation of glandular contents after the sebaceous gland ducts are blocked, and the treatment of severe cases is mainly based on surgical treatment, and the doctor needs to choose to carry out surgery according to the condition, such as cystectomy, incision and drainage, etc.; for the smaller cysts on the face and without infection, laser treatment, minimally invasive ionization treatment and other physical treatments can be considered. For patients with sebaceous cysts complicating infection, local redness, swelling, pain, pus, ulceration and other symptoms, need to use antibiotics for treatment, such as fusidic acid ointment, clindamycin ointment and so on. Sebaceous cysts are benign lesions, generally a good prognosis, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor to choose the best treatment options, avoid private medication, so as not to delay the condition.