Modern medicine believes that hyperthyroidism is a disease caused by genetic, mental factors and autoimmune and other causes of abnormal increase in thyroid hormone levels, which leads to increased excitability and metabolic hyperactivity of the nervous, circulatory, digestive and endocrine systems as the main manifestation of the disease. Western medicine often adopts antagonistic therapy, surgical resection and iodine 131 to kill part of the thyroid follicles, which has big side effects and high recurrence rate, and not only brings great physical and mental pain and economic burden to the patients, but also fails to cure the disease pathologically. Abnormalities in the conversion and metabolism of T4 and T3 by the liver are the main cause of hyperthyroidism. Long-term mental stress will cause excessive nerve excitation, leading to excessive secretion of T4 by the thyroid gland, and excessive T4 acting on the liver is the main cause of liver cell damage, which in turn is the main cause of liver metabolism malfunction of thyroxine, thus forming a vicious circle. Physiological state, T3 is converted from T4 from liver cells (liver cells in the conversion of T4, only part of the T4 into T3, the excess part of the conversion of no physiological function of the anti-T3-Tr), the amount of secretion is very small, but the promotion of T3 on the cellular metabolism is stronger than the T4 five times more than the promotion of the human body metabolism of the main hormone, so in the body to maintain a certain amount of T3 to meet normal Metabolism needs. Under normal circumstances, the human gland secretes more hormones than the physiological amount, if all the T4 in the body to be converted into T3, will exceed the physiological threshold of T3 and lead to hyperthyroidism. To maintain a stable and reasonable production and secretion of T3, it depends on the regulation of liver cells, that is, the liver maintains the physiological balance of thyroxine, which is the highest point of Chinese medicine – the balance of yin and yang.