Hidradenitis suppurativa

Hidradenitis suppurativa (HS), sometimes known as acne inversa or Verneuil's disease, is a long-term dermatological condition characterized by the occurrence of inflamed and swollen lumps. These are typically painful and break open, releasing fluid or pus. [Source: Wikipedia ]

Suppurative hidradenitis
May Cause
May Be Caused by
Pyoderma gangrenosum - acne - suppurative hidradenitis