Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hailey-Hailey disease ?
    ### Response:
    Hailey-Hailey disease is a hereditary blistering skin disease. Signs and symptoms include a painful rash and blistering in skin folds such as the armpits, groin, neck, under the breasts, and between the buttocks. Secondary bacterial infections are not uncommon.
    