Hyperthyroidism, commonly known as “hyperthyroidism”, is not new to many people. It is a very common endocrine disorder, which is a syndrome caused by excessive secretion of thyroid hormones (e.g. FT3, FT4, etc.), increased excitability of the nervous, circulatory and digestive systems and hyper-metabolic functions. It is a chronic organ-specific autoimmune disease, mostly related to family inheritance, and its onset is mostly related to environmental changes, mental stimulation and other factors. Its prevalence can exceed 1% of the population, and it is most common in young and middle-aged women aged 20-50. Hyperthyroidism is one of the most common diseases in our clinic. Patients with hyperthyroidism may experience some conscious symptoms, such as panic, rapid heartbeat, shortness of breath, fear of heat, excessive sweating, excessive eating, easy hunger, hand tremor, foot tremor, short temper, weakness, weight loss, insomnia, and increased stools. Most patients may also find themselves with thickening of the neck or enlargement of the front of the neck. A few patients have protruding eyes and menstrual disorders. Patients suffering from hyperthyroidism need not be alarmed, as the disease is completely curable. However, unlike a cold or flu that will be cured in a few days, there is a process to be followed. There are four common treatments: (1) internal antithyroid medication; (2) surgical treatment; (3) nuclear medicine isotope iodine-131 treatment; and (4) Chinese herbal medicine supplemental treatment. The treatment of hyperthyroidism with isotope iodine-131 has been used for more than 60 years. A large number of clinical applications at home and abroad have proved that iodine-131 treatment for hyperthyroidism is easy and safe, with precise efficacy, low recurrence rate, few complications and low cost. Many experts believe that isotope iodine-131 therapy is the first choice for the treatment of hyperthyroidism. Isotope iodine-131 treatment for hyperthyroidism must be performed in a nuclear medicine department. Most patients can have their disease controlled after treatment and can be cured with a single dose. A small number of patients require a second treatment after six months. It takes more than 2 weeks after taking iodine-131 to start to show the effect of treatment, and within 3 months the symptoms of hyperthyroidism gradually improve, the thyroid gland shrinks and some patients’ proptosis can be reduced. 6 months to 2 years the symptoms can be completely eliminated and the hyperthyroidism can be cured. At the early stage of using iodine-131 to treat hyperthyroidism, there were concerns about the risk of cancer and leukemia and congenital abnormalities in fetuses. After half a century of clinical practice and extensive in-depth research, these fears have been eliminated. Statistics on more than one million patients at home and abroad show no increase in the incidence of leukemia or thyroid cancer, no more than natural incidence of fetal malformations, and no effect on fertility and offspring development! Only a few patients have early reactions within 2 weeks after taking the drug, such as nausea, vomiting, dizziness, weakness, rash, itching, etc., which are generally mild and can disappear on their own. Some patients may experience a transient exacerbation of hyperthyroidism, which is usually temporary. Very few patients with severe symptoms have to be hospitalized for observation. Late complications are mainly hypothyroidism (referred to as hypothyroidism). However, hypothyroidism is not terrible, and normal thyroid function can be maintained with the right amount of thyroxine supplementation. The thyroxine rarely passes through the placenta and has no effect on the fetus in pregnancy.