Thyroid diseases mainly include endemic goiter, hyperthyroidism, hypothyroidism, thyroiditis, thyroid nodules, thyroid cancer. For thyroid diseases, special attention should be paid to iodine intake in diet. 1. Don’t recommend eating food with low iodine content: for patients with endemic goiter and hypothyroidism caused by iodine deficiency, if they eat food with low iodine content, their bodies can’t get enough iodine supply, which will lead to dysfunction of thyroid gland in synthesizing thyroxine, and may aggravate the symptoms of endemic goiter and hypothyroidism. 2. Avoid eating foods with high iodine content: for patients with hyperthyroidism and thyroid nodules with hyperthyroidism, avoid eating iodine-rich foods, such as kelp and seaweed, so as not to aggravate the condition. For patients with thyroid cancer and thyroid nodules with normal thyroid function, there are no obvious dietary restrictions, and for patients with thyroiditis, iodine-rich foods should be eaten in small amounts. Dietary modification for all patients with thyroid disease should be established under the active treatment of the primary disease and the guidance of professional physicians, and should not be self-adjusted.