Hidradenitis suppurativa

[Michiko]

Hidradenitis suppurativa is inflammation of the hair follicles in the skin under the arms, in the groin, and around the nipples and anus, resulting in scarring, inflammation, and painful accumulations of pus under the skin.

The cause of hidradenitis suppurativa is not known.
Bumps that look like acne form on the skin, followed by painful abscesses and sinus tracts.
To diagnose hidradenitis suppurativa, doctors examine the skin.
Treatment depends on severity but may include creams applied to the skin, antibiotics and other drugs taken by mouth, and surgical procedures.

Hidradenitis suppurativa develops in some people after puberty when the hair follicles (the pores in the skin where hair grows) under the arms, in the groin, and around the nipples and anus are chronically blocked and become inflamed. The hair follicles may swell and form bumps that look like acne. Doctors do not know why the blockage occurs, but it is not related to poor hygiene, to the use of deodorants or powders, or to underarm shaving.
The blockage causes the hair follicles to swell and rupture, sometimes leading to infection by various bacteria. The abscesses (pus-filled pockets) that result are tender, painful, and foul smelling, can grow deep into the skin, and tend to reappear if they heal. After the abscesses heal and reappear repeatedly, the skin in the area becomes thick and scarred. Often, permanent channels (called sinus tracts) form between the abscess and the skin surface and drain pus.
Hidradenitis suppurativa may cause only a few abscesses and be mild or may cause many abscesses and sinus tracts and be severe. Hidradenitis suppurativa can affect a person