Acne is also known as acne vulgaris. Acne is a chronic inflammatory disease of the sebaceous glands of the hair follicles that occurs on the head, face and upper chest and back. The main manifestations are whiteheads, blackheads, inflammatory papules, pustules, nodules and cysts. When you have acne, you should pay attention to skin cleanliness, reduce the use of oily cosmetics, do not squeeze and scratch acne with your hands, and control the intake of fat and sugar foods. It is also recommended to visit the dermatology department of the hospital in time, and after professional and targeted examination, treatment should be carried out under the guidance of the doctor. Topical medications such as retinoic acid, peroxynivalenol, antibiotics, azelaic acid, etc. can be chosen for treatment. Facial acid brushing treatment is also very effective for blackheads and acne. For home use, low concentrations of salicylic acid or fruit acids can be used, which are safer. Hospital acid brushing usually uses a higher concentration of salicylic acid or fruit acid, which is more effective, but needs to be operated by a professional doctor. After brushing acid must pay attention to avoid light and sun protection. The more serious symptoms can be systemic drug treatment, can follow the doctor’s advice oral minocycline, isotretinoin and other drugs. For patients who cannot tolerate or do not want to accept medication, physical therapy, such as photodynamic therapy (PDT), intense pulsed light (IPL), red and blue light irradiation treatment, etc., can also be considered.