Eosinophilic folliculitis is a rare skin disorder characterized by the formation of raised, small, fluid-filled bumps (pustules) in cycles. These skin bumps are caused by changes in hair follicles, or the site where hair grows out of the skin. There are three types of eosinophilic folliculitis: classic eosinophilic pustular folliculitis, immunosuppression-associated eosinophilic folliculitis, and infancy associated eosinophilic folliculitis. Eosinophilic folliculitis is most common among adults age 20-40, and the infancy associated type is most common among infants age 5 to 10 months. This disorder affects males more often than females, is most common among individuals with HIV/AIDS, and the classic type most often affect those of Japanese decent.
The main symptom of eosinophilic folliculitis is the presence of small, raised, fluid-filled bumps on the skin. A type of white blood cell, called eosinophils, clump in the hair follicles on the skin to cause these bumps. The bumps tend to appear on the face and stomach, but can be found on all areas of the body. The bumps may also be itchy or painful. After a patch of bumps heals, the skin may appear darker in this area.
Eosinophilic folliculitis can be diagnosed using tests to rule out infection from fungus or bacteria that could also be a cause of the pustules. A blood test for eosinophil levels may also be performed. Medication may be used to treat the skin bumps seen in this disease. Talk to your doctor or dermatologist about the most current treatment options.