A 44-year-old cisgender man was diagnosed with HIV approximately 4 months prior and promptly started taking antiretroviral medications. At the time of diagnosis, his initial HIV RNA was 123,300 copies/mL and CD4 count 39 cells/mm³. Three months after starting antiretroviral therapy, he is seen for a follow-up visit and has an HIV RNA less than 40 copies/mL and a CD4 count of 223 cells/mm³. At the clinic visit, he is noted to have a diffuse rash that consists of pruritic erythematous papules associated with hair follicles on his neck, chest, back, and upper arms. There is no rash in the axillae or on the hands, legs, or feet. The rash has worsened during the prior 3 weeks. He otherwise feels well. A skin biopsy is performed and shows perifollicular infiltrates of lymphocytes and eosinophils.