Back acne can be caused by acne, folliculitis, etc. It can be treated with topical retinoids, antibiotics, and antifungal drugs as prescribed by the doctor. 1. Acne: If acne is the cause of back acne, you can follow the doctor’s instructions for topical retinoids, which can promote the differentiation of epidermal cells, common drugs are retinoid ointment, tazarotene gel, adapalene gel and so on. You can also follow the doctor’s instructions to use antibiotic drugs, antibacterial effect, common drugs are clindamycin, fusidic acid cream. 2. Folliculitis: folliculitis can also cause back acne, if the bacterial infection caused by folliculitis, you can follow the doctor’s instructions for topical antibiotic drugs, such as erythromycin, mupirocin, etc.; if it is a fungal infection caused by the doctor’s instructions for topical antifungal drugs, such as miconazole, terbinafine. It is recommended that patients with back acne go to a regular hospital, under the guidance of the doctor to use drugs, is strictly prohibited unauthorized use of drugs.