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Hidradenitis

Also known as:  hidradenitis suppurativa

What is it?

Hidradenitis is an inflammation of the sweat glands. Suppurativa means there is an accumulation of pus.

Who gets it?

Hidradenitis may occur in anyone who has reached puberty.

What causes it?

The cause of hidradenitis is unknown, but it may be genetically inherited. There is no link between hidradenitis and shaving or the use of deodorants.

What are the symptoms?

The sweat glands under the arms, under the breasts, and around the genitals and anus, called the apocrine sweat glands, become blocked in people with hidradenitis. The glands swell with pus, creating a sore, red abscess that can break open (rupture). The pus that drains out has a foul smell, and may lead to infection. Repeated cycles of ruptured abscesses leave the skin thickened and scarred.

How is it diagnosed?

Hidradenitis is diagnosed by the location and appearance of the abscesses.

What is the treatment?

To treat hidradenitis, your doctor will recommend placing hot compresses on the abscessed areas and will prescribe antibiotics for the infection. Your doctor may need to make a small incision in an abscess to drain the pus. Severe cases of hidradenitis require surgical removal of the abscesses and, in some cases, the surrounding skin. This is followed by skin grafts to repair the area.

Self-care tips

There is no known way to prevent hidradenitis.


This information has been designed as a comprehensive and quick reference guide written by our health care reviewers.  The health information written by our authors is intended to be a supplement to the care provided by your physician.  It is not intended nor implied to be a substitute for professional medical advice. 

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This page was last updated on October 31, 2006
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