Acne is generally referred to as sebaceous cysts, which may be due to blockage of sebaceous gland excretory ducts and formation of retention cysts by sebaceous gland stagnation. The main physiological function of sebaceous glands is to secrete sebum, which is usually excreted through the sebaceous ducts and forms a protective film on the skin surface, which facilitates the protection and moisturizing of the skin. If the sebaceous ducts are blocked, sebum drainage is impeded, and the sebaceous glands gradually increase in size, forming cystic tissue. Factors such as acne and damage to the skin may increase the risk of suffering from the disease. Sebaceous cysts usually appear as intradermal swellings that protrude from the skin surface, and when infected, they may become red, swollen, painful, pus-filled, and ulcerated. It is recommended that patients go to the hospital in a timely manner and under the guidance of a physician for relevant treatment.