Sebaceous cysts are caused by localized pore blockage and are sometimes confused with other skin conditions and tumors, and need to be examined by histopathology or ultrasound to determine the results. Sebaceous cysts are called “powdery tumors” in Chinese medicine, and they like to occur in the skin or subcutaneous tissues of the head, trunk, or genitals, and can be pushed when pushed by hand. The main cause is obstruction of the excretory ducts of the sebaceous glands, which are swollen by the gradually increasing contents, forming retention cysts. The cysts are lined with white curd-like sebaceous gland secretions. It usually grows bigger and bigger and is prone to bacterial infection. The best treatment is surgical excision, which can be clinically cured. The chance of sebaceous cysts becoming cancerous is extremely rare. They are benign swellings and can be left untreated, but may affect aesthetics. Surgical removal is simple and excised. A skin incision is made in the direction of the skin line and the cyst is removed along with it. It should be removed as completely as possible, otherwise it tends to recur. If the exchange is complicated by infection, it should be given anti-inflammatory treatment such as oral antimicrobial drugs and hot compresses, and surgical excision can be performed only after the inflammation subsides. It is recommended to avoid spicy and stimulating food in daily diet and prohibit drinking alcohol. Drink more water, eat more fresh fruits and vegetables, avoid fish and shrimp and other aquatic food. If it is not infected, it will usually grow bigger and bigger. It is recommended that you must go to a regular hospital for examination and treatment, such as inexperience, it will lead to misdiagnosis.