Hyperparathyroidism Hyperparathyroidism is an excess of parathyroid hormone in the bloodstream due to the overactivity of one or more of the body’s four parathyroid glands.There are three types of Hyperparathyroidism – primary, secondary and tertiary. In this section: Hyperpara Patient Videos Support Your parathyroid glands Primary Hyperparathyroidism Secondary Hyperparathyroidism Tertiary Hyperparathryoidism Parathyroid cancer
