They most commonly affect the scalp and rarely the beard ... which clinically may look exactly alike. Folliculitis decalvans starts with perifollicular erythema, follicular papules, and pustules ...

Folliculitis decalvans is a scarring folliculitis of the scalp in which Staphylococcus aureus is commonly cultured. The onset is typically in young and middle-aged adults who are otherwise healthy ...