Inflammatory condition involving the apocrine gland-bearing areas of skin, characterized by recurrent painful draining nodules.
More common in women and black or biracial individuals.
Rarely occurs before puberty.  Peak age of onset is 11–20 yo in women and 21–30 yo in men.
Hidradenitis suppurativa
Carbuncle
Herpes labialis
Furuncle
Erythema infectiosum
Epidermoid or dermoid cyst
Tinea cruris
Erysipelas