Acne on the chest is a common phenomenon. High androgen levels or endocrine disorders may lead to keratinization and blockage of the hair follicle opening and prevent normal sebum discharge, forming acne on the chest, which usually requires no special treatment and can be applied with retinoic acid and other treatments in severe cases. It can also be considered to be caused by sebaceous cysts occurring on the chest, hair follicle blockage resulting in folliculitis, eczema, etc. Common causes and treatments 1, sebaceous cysts: usually may be due to a dirty living environment, lack of hygiene, more skin dirt, or local skin infection, local skin trauma damage sebaceous glands and other reasons, resulting in sebaceous gland duct blockage, the secretion of sebum can not be discharged normally from the mouth of the hair follicle, in the gland gathered to form cysts. They can be seen on the surface of the skin and are painful when pressing on the surrounding tissues, and can become red, swollen and pus-filled if infected. Small cysts are usually treated without special treatment, while larger cysts are treated surgically, either by incision in the hospital or, if necessary, by laser treatment. For some patients with infection, it is sometimes necessary to use antibiotics followed by topical gold cream to relieve the symptoms of swelling and pain; 2. Folliculitis: it may be due to trauma, hair plucking, excessive cleaning and other stimulation of hair follicles, resulting in infection leading to folliculitis, which can also occur in the chest and may appear as local redness or burning pain, pressure pain. Some mild folliculitis can subside on its own without special treatment; those with severe symptoms can choose topical drugs such as ketoconazole cream and oral drugs such as itraconazole; 3. Eczema: eczema may be caused by abnormal immune function, skin barrier dysfunction or exposure to allergenic substances, which can be relieved by topical glycolic lotion, glucocorticoid cream, etc., or oral anti-inflammatory drugs such as loratadine and cetirizine to relieve itching. Precautions During the treatment process, patients should avoid scratching the affected area with their hands, while paying attention to excessive cleaning, pay attention to a light diet during treatment and avoid spicy and stimulating food.