Hidradenitis suppurativa (HS) is an inflammatory condition of the hair follicle. Recurrent, inflamed nodules and cysts form in the armpits and groin. These may also be found under the breasts, and around the nipples and anus.

Sweat Gland
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The hair follicle becomes blocked causing inflammation of the sweat glands. The blockage may lead to absesses, infection, or scarring.