Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) nephrogenic diabetes insipidus ?
    ### Response:
    Nephrogenic diabetes insipidus is a disorder of water balance. The body normally balances fluid intake with the excretion of fluid in urine. However, people with nephrogenic diabetes insipidus produce too much urine (polyuria), which causes them to be excessively thirsty (polydipsia).
    