It is possible to go to work after taking iodine-131, usually in about 7 days for patients with hyperthyroidism. Iodine-131 is a common targeted therapeutic drug that can usually be used to treat thyroid disorders such as diffuse goiter with hyperthyroidism. Through the highly selective uptake function of iodine by human thyroid tissue, the isotope of iodine is ingested into the thyroid tissue, and through the beta rays emitted by its decay, the follicular tissues of the thyroid gland are destroyed, thus achieving the effect of treating hyperthyroidism. Generally, most of the iodine-131 can be absorbed by the thyroid tissue, and usually hyperthyroid patients can go to work in about 7 days. After Iodine-131 treatment for hyperthyroidism, patients need to make regular hospital visits to review their thyroid function and so on, and if any abnormality occurs, timely treatment under the guidance of the doctor.