Acne on the back can be manifested as bacterial folliculitis caused by bacterial infection, or malassezia folliculitis caused by fungi such as Malassezia. For different types of acne, we first conduct fungal microscopic examination in clinical practice to exclude whether folliculitis caused by Malassezia, and then carry out targeted treatment. For bacterial folliculitis, we can take antibiotics orally and use isotretinoic acid and erythromycin gel externally; If it is malassezia folliculitis caused by malassezia, we can apply antifungal cream or gel locally. At the same time, for patients with large areas, oral antifungal agents such as itraconazole or terbinafine can be recommended for 2 to 3 weeks. At the same time, the patients were instructed to reduce the sweat on the chest and back and the intake of oil.
