The most common type of acne in the middle of the chest is folliculitis, and a few may also be Malassezia folliculitis. The common folliculitis is caused by bacterial infections, most of which are related to excessive sweating, prolonged late nights, decreased immunity, etc. It can be treated with antibiotic medication, such as applying fusidic acid ointment or mupirocin ointment, twice a day. In severe cases, you can take oral doxycycline tablets, which usually take two to three weeks to completely subside, and pay attention not to eat too much sweet food and spicy, greasy food. In addition, the Malassezia folliculitis is a fungus, which is an infectious disease, in the treatment of topical antifungal drugs combined with antibiotics at the same time, it is recommended to apply terbinafine ointment combined with mupirocin ointment treatment, twice a day, Malassezia folliculitis need to adhere to treatment for about a month will completely subside.