### Diagnosis Little boils in the hair follicles. ### Epidemiologic Risks Itching and scratching and hot tub use. The former inserts grunge into the hair follicle. The latter allows organisms to enter the hair follicle as the heat causes dilation, that then closes when emerging from the hot tub, sealing the in the organisms. ### Microbiology Itching and scratching is *S*. *aureus*. Hot Tub: *P*. *aerugenosa*. Tinea barbae: *T*. *rubrum*. Neutropenics: *[[Candida]]* and molds (*[[Malassezia]]* *furfur*). IVDA: occasionally *[[Candida]]*. [[AIDS]]: idiopathic eosinophilic. ### Empiric Therapy It depends on the clinical setting. ### Pearls Always biopsy the [[Folliculitis]] in the neutropenic looking for an invasive mold. For recurrent disease, see [[Furuncles]].