Clinical manifestations Hyperthyroidism is a series of hypermetabolic syndromes of the body’s nervous system, circulatory system, digestive system, cardiovascular system and other systems, as well as hyperexcitability and ocular symptoms, caused by excessive secretion of thyroid hormones or increased levels of thyroid hormones (T3, T4) in the blood. Such as panic, tachycardia, heat, excessive sweating, hyperphagia, weight loss, fatigue and emotional agitation, impatience, insomnia, lack of concentration, protruding eyes, trembling hands and tongue, goiter or enlargement, women may have menstrual disorders or even amenorrhea, men may have impotence or breast development, etc. I. Internal drug therapy: including antithyroid drug therapy, adjuvant therapy and life therapy to enhance nutrition. Anti-thyroid drugs are based on thiourea compounds, and this method is the main method of medical treatment. Adjuvant treatment is mainly symptomatic treatment such as insulin, etc. The indications are: ① moderate to severe hyperthyroidism, long-term medication is ineffective, relapse after stopping medication, or those who are not willing to take long-term medication; ② huge thyroid gland or those with pressure symptoms; ③ post-thoracic goiter with hyperthyroidism; ④ nodular goiter with hyperthyroidism. Radiation therapy 131 iodine treatment for hyperthyroidism has the advantages of simple, safe and economical, good efficacy, high cure and little side effects. Which hyperthyroid patients are suitable for radioactive iodine therapy? It is generally accepted that radioactive iodine therapy is suitable for both male and female adult patients. It is mainly indicated for the following patients: moderate hyperthyroidism, age >25 years old; patients who are allergic to anti-hyperthyroid drugs and cannot continue to use them, or those who are ineffective in long-term treatment, or those who relapse after treatment; patients with combined heart, liver and kidney diseases who are not suitable for surgery, or those who relapse after surgery, or those who do not want to operate; and patients with hyperthyroidism with high-functioning nodules.