Thyroid function, ultrasound of thyroid and neck lymph nodes and thyroid tumor markers need to be rechecked one month after thyroid cancer surgery. 1. Thyroid function: after thyroid cancer surgery, the thyroid tissue will be reduced and the secretion of thyroid hormone will be obviously reduced, so it is necessary to supplement thyroid hormone treatment, and it is necessary to check the thyroid function one month after the surgery to find out whether the dosage of the medicine is appropriate or not. 2. Ultrasound of thyroid gland and lymph nodes in the neck: to know the recovery of the thyroid region after the operation, and to know whether there is recurrence. 3. Thyroid tumor marker: it is an important examination item to understand the recurrence of cancer in patients, and it should be examined one month after surgery, which can provide preliminary understanding of the condition. After thyroid cancer surgery, regular rechecks should be carried out, focusing on the recovery situation, thyroid function, and at the same time monitoring whether the patient’s cancer has recurred.