eosinophilic folliculitis

Eosinophilic folliculitis (EF) is an itchy rash with an unknown cause which is most common among individuals with HIV, though it can occur in normal individuals where it is known by the eponym Ofuji disease. EF consists of itchy red bumps (papules) centered on hair follicles and typically found on the upper body, sparing the abdomen and legs. The name eosinophilic folliculitis refers to the predominant immune cells associated with the disease (eosinophils) and the involvement of the hair follicles.
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Folliculitis is inflammation or infection of one or more hair follicles. Description Folliculitis can affect both women and [more]Eosinophilic folliculitis - Community and Resources

a rash of itchy, red, pus-filled bumps on the face, arms, chest and back. The cause is unknown, but has been associated with Demodex mites and Pityrosporum yeast; the presence of eosinophils in the hair follicles indicates that the condition may involve an allergic reaction.

A type of folliculitis (inflammation of hair follicles) characterized by recurring patches of inflamed, pus-filled sores, primarily on the face and sometimes on the back or upper arms. The sores usually spread, may itch intensely, and often leave areas of darker than normal skin (hyperpigmentation) when they heal. HIV-associated EF most commonly occurs in people with low CD4 counts.