Men’s back acne may be caused by mite dermatitis, or Malassezia folliculitis, and may be caused by acne, the causes are different, the treatment is different. 1. Mite dermatitis: mite dermatitis is an inflammatory reaction of the skin caused by mite bites or contact with mite secretions, men suffering from this disease can appear back acne symptoms, treatment should be diligent bathing, changing clothes and bed linen, can be coated with glycerite lotion to relieve the itching, and if necessary, can be combined with oral loratadine and other drugs. 2. Malassezia folliculitis: Malassezia folliculitis is a kind of inflammatory disease of hair follicles caused by Malassezia infection, the patients of this disease can have the symptom of pimples on the back, the treatment can be used ketoconazole, bifonazole to carry on the antifungal treatment, but also can be used vinpocetine ointment to improve the follicle keratinization, so as to make antifungal drugs work in the hair follicles of the Malassezia bacteria in the deep part of the follicle. 3. Acne: Acne is a chronic inflammatory disease of the sebaceous glands of the hair follicles, which may be related to androgen levels, propagation of Propionibacterium acnes, genetics and other factors, and can be treated with medications such as retinoic acid ointment, benzoyl peroxide and fusidic acid cream. In addition to the above diseases, other diseases can also lead to the symptoms of men’s back acne, it is recommended to consult a doctor in time to identify the causes and ask the doctor to deal with it.