Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hidradenitis Suppurativa ?
    ### Response:
    Hidradenitis suppurativa (HS) is a chronic skin disease. It can occur in one or multiple areas of your body. HS usually develops in your armpits, groin, and anal area. It causes long-term skin inflammation and can be painful.     Symptoms include        - Blackheads and red, tender bumps, called abscesses.
    