Acne on the back and chest may be caused by excessive secretion of sebaceous glands, folliculitis, acne and other diseases, which need to be selected according to their causes such as general treatment, medication, laser treatment and so on. 1. Excessive secretion of sebaceous glands: Endocrine disorders and improper diet can lead to excessive secretion of androgens, resulting in excessive activity of sebaceous glands, thus causing acne on the back and chest. This phenomenon does not require special treatment, it is recommended that patients need to develop a regular routine, cultivate good habits, diet needs to avoid spicy food. 2. Folliculitis: The lack of good local hygiene can lead to excessive accumulation of old keratin in the hair follicles, which can lead to back and chest acne. First of all, patients need to do a local skin hygiene, at the same time with erythromycin ointment, fusidic acid cream for external use. 3. Acne: Localized infection with Propionibacterium acnes can also lead to the phenomenon of back chest acne, treatment can choose red and blue light irradiation to inhibit the growth of Propionibacterium acnes, so as to achieve the purpose of improving the disease. Different causes of back chest acne, the treatment is different, the symptoms suggest that timely go to the hospital to improve the examination, follow the doctor’s instructions to take the standardized treatment, do not private treatment, so as not to lead to adverse consequences.