The postoperative review of thyroid cancer mainly involves two aspects, one is the imaging review and the other is the thyroid function review. The imaging review is mainly the ultrasound or CT of the neck or thyroid gland, but people often focus on the thyroid function. Thyroid function includes T3, T4, free T3, T4 and thyroid stimulating hormone or thyroglobulin antibodies, but the main focus is on thyroid stimulating hormone, or TSH, which is recommended to be suppressed to less than 0.1 mU/L for patients with high-risk relapses and 0.1-0.5 mU/L for patients with intermediate risk relapses. situation according to the physician’s professional guidance. A second concern is thyroglobulin and thyroglobulin antibodies, which are also important for the assessment of postoperative thyroid recurrence.