Hidradenitis suppurativa (HS) is a common (though rarely diagnosed), chronic
skin disease characterized by clusters of
abscesses or subcutaneous boil-like "infections" (oftentimes free of actual bacteria) that most commonly affects
apocrine sweat gland bearing areas, such as the
underarms,
under the breasts, inner thighs, groin and buttocks. The disease is not contagious. There are indications that it is hereditary among certain ethnic groups and autoimmune in nature. Onset is most common in the late teens and early 20's.