A high parathyroid hormone of 2000 pmol/L (the reference value range may be different in different hospitals) may be caused by primary hyperparathyroidism, hypocalcemia and other diseases, which usually require treatment, and should be treated under the guidance of a doctor, with different treatments for different conditions. Parathyroid hormone is a peptide hormone secreted by the parathyroid glands, which can promote the elimination of phosphates from the body and the release of calcium from bone tissue, and can be used to determine the function of the parathyroid glands. Elevated parathyroid hormone can be seen in primary hyperparathyroidism, hypocalcemia and other diseases, and it is recommended to improve the relevant tests, such as blood calcium, blood phosphorus and so on. Treatment is usually needed, including surgery and internal medicine. Without timely treatment the disease may progress, and in severe cases, parathyroid crisis may occur and may even be life threatening. It is recommended to visit a hospital and ask your doctor to make a judgment when you have a parathyroid hormone of 2000 pmol/L.