Acne on the back can be caused by acne, folliculitis, urticaria, milia, common warts and other diseases. Treatments mainly include topical medications, oral medications, physical therapy, and surgical treatments. 1. Acne: Acne can cause the manifestation of pimples. Adapalene gel and retinoic acid cream can be given to improve the keratinization of sebaceous gland ducts and dissolve pimples; at the same time, topical clindamycin gel can be used to anti-inflammatory and kill Propionibacterium acnes. In severe cases, oral treatment with retinoids and antibiotics is needed. 2. Folliculitis: back folliculitis causes acne symptoms, can be given fusidic acid cream, mupirocin ointment and other topical application, oral erythromycin, cephalosporin, amoxicillin and other drugs if necessary, anti-infection treatment. If boils are formed, if necessary, surgical incision and drainage of pus, postoperative anti-infection treatment to promote recovery. 3. Urticaria: Urticaria causes erythema, acne, etc., can appear on the back of the manifestation of pimples, can be given under the guidance of the doctor to the glycerine lotion topical application, if necessary, with oral loratadine, cetirizine and other anti-allergy, antipruritic treatment. 4. Corn Rash: Corn Rash is also commonly known as prickly heat, which can appear in the back of the acne symptoms. It is recommended to get out of the hot environment, use prickly heat powder, glycerite lotion, etc., to play the role of astringent, anti-itching, and so on. 5. common warts: common warts lead to the appearance of flat papules on the back, can appear in the back of the manifestation of pimples, can be given to salicylic acid ointment, retinoic acid cream, imiquimod cream and other medications for topical treatment, but also through the laser, electrocautery, freezing and other physical methods of treatment. It is recommended that patients with back acne go to the dermatology department of the hospital in a timely manner, after a clear diagnosis and standardized treatment under the guidance of the doctor.