Acne may be related to acne, folliculitis and other factors. 1. Acne: also known as “pimples”, may be related to androgenic factors, dietary factors, Propionibacterium acnes reproduction, genetic factors, and so on. It occurs in adolescents, commonly in the frontal face, chest and back and other parts of the body, mostly symmetrically distributed, manifested as pimples, small bumps (pimples), nodules and other symptoms, most often accompanied by enlarged pores and sebum overflow. 2. Folliculitis: large parts of the folliculitis is due to bacterial and fungal infections, occurring in the head, face, neck, thighs and other parts of the head, manifested as red pimples around the hair follicles, accompanied by redness, swelling, pain, fever, and other symptoms, the serious cases may also appear pus, broken, etc., the patient may be self-conscious of itching, pain. Old acne may also be due to other factors, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor to identify the cause of the disease, targeted treatment.