If you need radioactive iodine 131 iodine treatment after thyroid surgery, you can hang up with the Department of Nuclear Medicine. Radioactive iodine 131 iodine therapy is a very effective treatment for thyroid disease. The nuclear medicine doctor will take into account the patient’s condition and physical status to determine whether iodine 131 iodine therapy is needed after thyroid surgery. If this treatment is recommended, the patient should follow a low iodine diet and stop taking thyroxine preparations for 3 to 4 weeks before treatment. In patients using antithyroid drugs, propylthiouracil is stopped for 2 weeks. During the course of the treatment, because of the radioactive nature of iodine 131, the patient is isolated in a specific room for about 1 week, and family members are not recommended to accompany the patient during this period. Iodine 131 treatment should be directed by a doctor, and it is recommended that the patient go to a regular hospital in a timely manner.