Thyroid cysts should be on an iodine-adapted diet with normal consumption of iodized salt. Thyroid cysts are fluid-containing sacs in the thyroid gland. Most of the thyroid cysts are formed by the degenerative changes of thyroid nodules or adenomas, which are usually caused by the compression of the surrounding veins by thyroid nodules or adenomas, resulting in impaired local blood circulation, ischemia, degeneration and necrosis of the tissues, interstitial stasis and edema, and the accumulation of fluids and the formation of cysts. Thyroid cysts usually have normal thyroid function, can be moderate iodine diet, normal consumption of iodized salt, normal consumption of seafood, regular review of thyroid function and thyroid ultrasound. Patients with thyroid cysts are advised to have a scientific diet under the guidance of a doctor.