Hidradenitis suppurativa, also referred to as acne inversa or Verneuil disease, involves a chronic, suppurative inflammation of the apocrine glands in the perineum, axilla, and submammary and perianal regions. Initial occlusion of hair follicles allows sweat to accumulate beneath keratin plugs which promotes bacterial proliferation. The most common causative microorganism is Staphylococcus aureus. Women are more often affected than men. This 17-year-old was obese.