4. Adenoma
In many cases of high parathyroid hormone being found in the body, it is caused by an adenoma. An adenoma is a tumor. These types of tumors are not cancerous and can develop for any number of reasons. When an adenoma develops on the parathyroid, it can cause an increase in the parathyroid hormone. The adenoma puts pressure on the parathyroid or causes damage to the gland. When this gland is damaged, it will not function the way that it should. In most cases, this means that it will start producing more parathyroid hormone than the body needs. When there is more parathyroid hormone released, it can cause calcium levels to increase. Often the calcium from the bones is released when it should not be. This can lead to bone pain, muscle aches, and can develop into osteoporosis. A doctor can remove the adenoma to try and reverse the damage.