Hidradenitis suppurativa is a long-term (chronic) skin condition. The cause is unknown. Inflammation of the apocrine sweat gland-bearing areas leads to painful and repeated lumps of pus (boils or abscesses). Suppuration means formation or discharge of pus. These areas (commonly the armpits and groin) leak pus and are difficult to heal. Eventually, scarring occurs. Treatments include antibiotic lotions or medicines, or an operation to remove the affected skin area. A newer treatment works by blocking a chemical of the immune system that causes inflammation in the body.