In most cases, sebaceous cysts are found in the male genitalia and it is recommended to go to the hospital for further examination. Sebaceous cysts can be found in various parts of the epidermis of the body, and the skin of the scrotum also has sebaceous glands. The sebaceous glands are blocked when a lesion occurs, and the secretions from the sebaceous glands accumulate in the glands, gradually expanding over time to form cyst-like changes. It appears as a raised lump on the skin, usually without obvious pain or localized redness or swelling. When squeezed, the sebaceous fluid that accumulates within it forms a milky or cheese-like substance that is extruded from the opening of the glandular ducts. Complete excision of the cyst is required; otherwise, if it is simply extruded, its inner wall still has some secretory function and can still form milky sebaceous fluid that is gradually discharged. When surgical excision is performed, the inner wall with secretory function needs to be removed in order to achieve complete cure.