The patient must first be seen by our physician as an outpatient to confirm that he or she is ready for 131I treatment, and then the method of admission and length of stay will be determined. It is important for patients to stop taking oral thyroid medications as prescribed by the doctor. It is also important to avoid iodine-rich foods and nutritional supplements or hormonal preparations, etc. Rest and care should be taken while waiting for admission to the hospital. In case of any change in condition or other special circumstances, you should contact the doctor in charge of our department in time for treatment or self-care as required by the new medical prescription. Patients are requested to take care to be admitted at the designated time and to bring along with them the records of previous treatments and the necessary necessities for hospitalization. Proceed with the admission procedures according to our hospital regulations and the special requirements of our department.