Many people who have hyperthyroidism often hear enthusiastic people suggest eating more iodine-rich foods, such as seafood like sea fish, sea shrimp, seaweed and seaweed. The onset of hyperthyroidism is not due to iodine deficiency, but to an excess of thyroid hormones in the body. Iodine is the raw material for the production of thyroid hormones. When hyperthyroidism occurs, the thyroid gland’s function of synthesizing thyroid hormone is enhanced. At this time, eating food containing iodine will make the thyroid gland synthesize more thyroid hormone, which will aggravate the condition. Also, large amounts of iodine can prevent the release of thyroid hormones from the thyroid gland into the bloodstream, causing the already manufactured thyroid hormones to remain in the thyroid gland. Anti-thyroid medication treats hyperthyroidism by inhibiting the production of thyroid hormones, and the excess thyroid hormones that have already been made can only be eliminated by their discharge from the thyroid gland into the bloodstream and by metabolism. Therefore, due to the effect of iodine, the already synthesized thyroid hormone will remain in the thyroid gland for a longer period of time, which will prolong the control of hyperthyroidism. Furthermore, after iodine is used for hyperthyroidism, the blood supply to the thyroid gland is reduced and the thyroid gland becomes hard. As a result, the ratio of anti-thyroid drugs absorbed orally into the bloodstream and transported through the bloodstream to the thyroid gland to exert therapeutic effects will be reduced, and the effect of the drugs will be weakened. Therefore, patients with hyperthyroidism should not eat foods rich in iodine, as well as western and Chinese medicines that contain a lot of iodine. The patient’s diet is especially important in the process of hyperthyroidism recuperation. Because of hyperthyroidism, the demand for nutrients increases significantly. If the nutritional supplementation is insufficient, the wasting will be more obvious, and even symptoms similar to those of advanced cancer will appear. Therefore, a proper diet is very important. Patients should pay attention to the following aspects of diet: daily calorie intake should be at least 2400 kcal for men and 2000 kcal for women. Young patients should eat more fatty foods, vitamin-rich fruits and vegetables, and less spicy foods, such as chili, onion, ginger and garlic. Eat less iodine-containing foods, such as seaweed, shrimp, sea fish, etc. Patients should pay special attention to psychological, emotional and spiritual life level self-regulation, to maintain a relaxed mood, happy spirit, stable emotions, avoid wind and cold, excessive exertion, high fever. Hyperthyroidism patients should pay attention to: l. Avoid spicy food: spicy, raw onion, raw garlic; 2. Avoid seafood: kelp, sea shrimp, scallops; 3. Avoid strong tea, coffee, tobacco and alcohol; 4. Keep a calm mood and avoid exertion.