Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) benign chronic pemphigus ?
    ### Response:
    Benign chronic pemphigus, often called Hailey-Hailey disease, is a rare skin condition that usually appears in early adulthood. The disorder is characterized by red, raw, and blistered areas of skin that occur most often in skin folds, such as the groin, armpits, neck, and under the breasts.
    