Learn about parathyroid hormone

Hyperparathyroidism

The primary disease of parathyroid glands is overactivity—too much parathyroid hormone is produced. This is called hyperparathyroidism. Under this condition of hyperparathyroidism, one or more of the parathyroid glands behaves inappropriately by making excess hormone regardless of the level of calcium. In other words, the parathyroid glands continue to make large amounts of parathyroid hormone even when the calcium level is normal and they should not be making hormone at all.