Thyroid cancer is a malignant tumor of the thyroid gland, which is the most common malignant tumor in the endocrine system. Hyperthyroidism is a functional disease that causes a series of symptoms and signs of hypermetabolism due to higher than normal thyroid hormones in the blood. The main diagnosis of thyroid cancer is based on fine needle aspiration cytology, intraoperative rapid pathology or postoperative pathology. In the case of hyperthyroidism, the main diagnosis is based on the measurement of thyroid function in the blood, supported by ultrasound of the thyroid gland, etc. Since the thyroid gland and the surrounding lymph are cleared, there will be no secretion of thyroxine, and the only way to supplement is to take medication. This situation does not exclude the use of excessive drugs, serious calcium deficiency, it is recommended to go to the hospital to check the thyroid function, trace elements, etc., according to the results of the appropriate adjustment of drug dosage.