Seafood can be eaten after thyroid cancer surgery, and attention should be paid to avoid excessive consumption. Some people think that seafood products contain a large amount of iodine, and if patients consume too much, it can increase the thyroid gland’s uptake of iodine, promote the synthesis and release of thyroid hormones, and cause hyperthyroidism, so it is not recommended that postoperative patients with thyroid cancer eat seafood, and this viewpoint is wrong. The iodine content in seafood is limited, and a small amount of consumption will not have a significant effect on the body. Moreover, seafood is rich in high quality protein and many kinds of vitamins, which can provide rich nutrients for the human body, therefore, patients with thyroid cancer can eat seafood after surgery. However, it should be noted that a low iodine diet should be carried out 1~2 weeks before iodine 131 radiation therapy, and at this time, it is recommended to avoid eating seafood, kelp and other iodized salt-containing foods.