Generally speaking, both high iodine and low iodine diets can cause an increase in the incidence of thyroid diseases, i.e. iodine intake and the incidence of thyroid diseases show a “U” curve relationship, and some people think that a high iodine diet may increase the incidence of papillary thyroid cancer. I personally believe that diet has little significance on the development, treatment and prognosis of thyroid cancer, because most thyroid cancers are low malignant and have a slow progression, and too much focus on diet may disrupt your life routine, which may have a greater impact on your body and may result in more losses than gains. It is also believed that hyperthyroidism and papillary thyroid cancer should be on a low iodine diet, but families with pregnant women or small children should pay attention to iodine intake, as iodine is important for the intellectual development of the fetus in the womb and the physical development of children. Nori, kelp, shrimp, shrimp, sea cucumber and other high iodine content, do not eat and eat less, but other foods should not be too much of a taboo, otherwise it will affect the immune system and quality of life.