①131 iodine treatment is particularly easy, economical, safe and painless. When the treatment is ready, only one dose (one sip) is needed and the whole treatment will be finished. Most patients take outpatient treatment and do not need to be hospitalized, and the symptoms will be reduced after 2~3 weeks of taking the medication, and gradually cured in about 3 months. It can be said that this treatment method is the easiest and most economical treatment method for hyperthyroidism. During the treatment process, most of the patients have no obvious toxic side effects, but a few patients have reactions, mainly dizziness, dry mouth, itchy skin and poor appetite, and there may be a slight aggravation of symptoms, but as long as appropriate measures are taken before and during the treatment process, it can be avoided or reduced to a minimum. ②The treatment effect is particularly good. The effectiveness rate is more than 98%, and the cure rate (i.e. the cure rate of taking one medicine or one bite of medicine) is as high as 70%~80%. ③It can be suitable for patients with ineffective anti-thyroid drugs, allergy, relapse after treatment, relapse after surgery, with obvious protrusion, patients who do not want to operate or have contraindications to surgery (such as heart disease, diabetes or blood disease). ④ There is no damage to the parathyroid glands, the laryngeal nerve and other peri-thyroid tissues, and thus no complications that may arise from surgical treatment, such as twitching of the hands and feet, hoarseness and inability to speak. No scar is left on the neck, and it does not affect the aesthetics. (5) For the few people who have not been cured by 131 iodine once, multiple 131 iodine treatments can be administered, and it does not affect the switch to other methods of treatment in the future. ⑥It has no significant effect on bone marrow and therefore does not cause white blood cell reduction. It also does not cause hair loss, does not affect fertility, does not cause secondary leukemia, does not cause malformations or genetic abnormalities, and does not cause cancer. This is the scientific conclusion of long-term research on 131 iodine treatment of hyperthyroidism by scholars at home and abroad for decades. Some strange and bizarre rumors in the society are unfounded and not credible. Although hypothyroidism (hypothyroidism for short) may occur in a small number of patients, it can be quickly corrected with thyroid hormone replacement therapy, and the hypothyroidism of some patients is temporary and can return to normal after a certain period of thyroid hormone replacement therapy, so hypothyroidism is not a serious negative consequence. It is also a vivid example of the modernization of medical science and should and can make a significant contribution to human health. Because of the unique advantages of 131 iodine therapy, which cannot be replaced by other methods, it is currently considered the treatment of choice for adult hyperthyroidism, except for patients who are breastfeeding, pregnant or have acute myocardial infarction.