Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Hailey-Hailey disease ?
    ### Response:
    Is genetic testing available for Hailey-Hailey disease? Yes. ATP2C1 is the only gene known to be associated with Hailey-Hailey disease. Genetic testing is available to analyze the ATP2C1 gene for mutations.Genetic testing for at-risk relatives and prenatal testing are also possible if the disease-causing mutation in the family is known.
    