If there is no metastasis after the recurrence of medullary thyroid cancer, the chance of cure is relatively high. Medullary thyroid cancer is a malignant tumor with high malignant degree, which is easy to recur after surgery. If the tumor is relatively limited, it can be removed by surgery at the early stage of recurrence, and then undergo iodine 131 treatment to inhibit the growth of cancer cells, which has the hope of cure. If medullary thyroid carcinoma has distant metastasis after recurrence, the success rate of cure is not high. In addition to total thyroidectomy, lymph nodes need to be cleared, and then iodine 131 treatment should be carried out. This kind of situation has a poorer prognosis, and it is often difficult to be cured, so patients need to take active treatment to prolong the survival period, and review metastasis on a regular basis. After medullary thyroid cancer surgery, patients need to undergo active rechecking, and if recurrence is found, patients need to undergo re-treatment at an early stage.