Malassezia (Pityrosporum) folliculitis is a fungal acneiform condition.
It is likely due to increased sebaceous gland activity.
Diagnostic studies include microscopic evaluation of the presence of yeast, cultures, and biopsies by a dermatologist/skin specialist.
The most effective treatment is oral antifungal medication (ketoconazole), particularly in the beginning as the yeast is located deep within the hair follicle. Topical antifungals are useful as adjunctive therapy as well as maintenance and prophylactic therapy, especially as recurrence is common.
Topical products, such as make-up, lotion, or sunscreens may also promote flares so should be avoided.
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