A survey by the Chinese Nutrition Society shows that the average daily salt intake of rural residents in China is 17 grams, 11 grams per capita of urban residents, according to the current market per gram of salt containing 20-60 micrograms of iodine, the average daily intake of iodine in the Chinese people has reached a staggering 220-850 micrograms, much higher than the World Health Organization has set the 200 micrograms per day of the safety line. According to Prof. Wang Xingguo, a dietitian at the Second Affiliated Hospital of Dalian Medical University, the problem of iodine overdose should be a cause for alarm, as iodine overdose can indeed lead to hyperthyroidism, thyroid nodules, thyroiditis, thyroid tumors, and so on. Excessive iodine intake is dangerous. The use of iodized salt was made mandatory in China in 1994. However, 15 years after the implementation of the universal iodine supplementation policy, more and more local epidemiological surveys show that some areas are experiencing a peak in the incidence of thyroid disease. The timing of this disease outbreak coincides with the mandatory use of iodized salt. As a result, there are increasing calls for boycotting iodized salt and independent iodine supplementation, such as whether coastal residents should be supplemented with iodine? Is the frequent occurrence of thyroid diseases related to the over-application of iodine? A comprehensive and in-depth census is imminent. Recently, Guangxi CDC endemic disease control officer Liu said, more than a decade of iodized salt iodine supplementation, did not cause harm to the body of Guangxi people. He said that two samples of 1,200 children surveyed, in 2002, the rate of goiter is 3.6%, 3.9% in 2005, and thus, according to national standards, belong to the normal range. This assertion lacks scientific validity. The academic community has called for excessive iodine to cause hyperthyroidism in the last 2 or 3 years; whether or not one has hyperthyroidism is not based on whether or not one’s neck is enlarged; and with 1,200 children, can one tell which region’s children are in? Is this sample scientific and reasonable? Nanning is a coastal city and there should be no shortage of iodine in the food. Excessive iodine intake can induce hyperthyroidism, and recessive hyperthyroidism can become overt hyperthyroidism. I take an internist, in Nanning’s largest community clinic 3 years of experience, and with endocrine metabolism specialists, Nanning in recent years, the incidence of hyperthyroidism is very high, and there is a tendency to increase. I know medical staff and family members of multiple hyperthyroidism sufferers, but I did not do community epidemiological surveys, and it is not appropriate to make any conclusions. The diet and nutritional status of the population has changed dramatically from the days of the prevalence of great-neckedness to the present day. A 15 year old teenager has recently developed hyperthyroidism, which is more severe. Although the diagnosis was given at the onset of symptoms and treatment was prompt, the multiple organ damage that can result from hyperthyroidism as a disease, as well as the side effects and adverse reactions to hyperthyroidism medication, that is not a simple matter.