Parathyroid hormone is secreted by the parathyroid glands, and its main function is to affect the metabolism of calcium and phosphorus in the body. When abnormal, it may lead to diseases such as tetany and fractures. Thyroxine is secreted by the thyroid gland, and its main function is to promote growth and development and tissue differentiation, regulate the function of the central system, and regulate metabolism, etc. Abnormalities can lead to hypothyroidism, hyperthyroidism and other diseases. 1. Parathyroid hormone: secreted by the parathyroid gland, it can affect the metabolism of calcium and phosphorus in the body. If the parathyroid gland secretion function is low, the concentration of calcium in the blood decreases, and tetany occurs; if the function is hyperactive, then it will cause excessive bone resorption, and fracture occurs easily. 2. Thyroxine: secreted by the thyroid gland, its main function is to promote growth and development and tissue differentiation, regulate the function of the central system, thermogenesis, regulation of metabolism, etc. Hypothyroidism can be manifested as dull expression, indifference, delayed neurological reflexes, dyskinesia, drowsiness, lack of appetite, etc., and hyperthyroidism can be manifested as trembling hands, irritability, enlarged thyroid gland, excessive sweating, etc.. If the value of parathyroid hormone or thyroxine is abnormal, it is recommended to go to a regular hospital and undergo relevant examinations to identify the cause of the disease.