Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Addison Disease ?
    ### Response:
    Your adrenal glands are just above your kidneys. The outside layer of these glands makes hormones that help your body respond to stress and regulate your blood pressure and water and salt balance. Addison disease happens if the adrenal glands don't make enough of these hormones.
    