Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Primary Hyperparathyroidism ?
    ### Response:
    Health care providers diagnose primary hyperparathyroidism when a person has high blood calcium and PTH levels. High blood calcium is usually the first sign that leads health care providers to suspect parathyroid gland overactivity. Other diseases can cause high blood calcium levels, but only in primary hyperparathyroidism is the elevated calcium the result of too much PTH.
    