Folliculitis is caused by a bacterial infection of the hair follicles. The first step in treating folliculitis is to maintain skin cleanliness. In the summer, it is important to bathe and change clothes frequently. Additionally, topical medications can be used, such as mupirocin ointment. For some cases of folliculitis that have not yet suppurated, ichthammol ointment can be applied to the swollen areas, and topical iodine can be used. For more severe cases of folliculitis, especially when boils form or multiple follicles are affected and congested, oral medications may be used. Commonly used in clinical settings are penicillins or cephalosporins if the patient is not allergic to them. Alternatively, macrolides like erythromycin, or fluoroquinolones and quinolones can be chosen. (Medication use should be under the guidance of a physician.)