Although the probability of recurrence of thyroid cancer is significantly reduced by surgery and postoperative thyroxine suppression therapy, iodine-131 radiation therapy and targeted therapy, thyroid cancer is essentially a malignant tumor and the risk of recurrence always exists. The probability of recurrence after thyroid cancer surgery is closely related to the type of thyroid cancer, but most thyroid cancers have a better prognosis and lower recurrence rate and can survive for a long time. Thyroid cancer is a malignant tumor originating from the follicular epithelium of the thyroid gland. According to the difference of tumor origin and differentiation, it can be divided into papillary thyroid cancer, follicular thyroid cancer, medullary thyroid cancer and undifferentiated thyroid cancer. Papillary thyroid cancer is the most common, accounting for more than 90% of thyroid cancer. Papillary thyroid cancer and follicular thyroid cancer have mild biological behavior, and early surgical treatment has a good prognosis, low recurrence rate and long-term survival; undifferentiated thyroid cancer is highly malignant and has a very poor prognosis, so if surgery cannot achieve curative effect, surgery is not recommended. The prognosis of medullary thyroid cancer is between them, and the average survival time can reach 15 years. Although the recurrence rate of most thyroid cancers after surgery is low, there is a risk of recurrence. Therefore, patients with post-surgical thyroid cancer need to have regular checkups at the hospital to rule out or detect tumor recurrence early. After treatment, they also need to keep their mood happy and avoid excessive mental stress. They should pay attention to increase nutritious food in their diet and also take outdoor physical exercise to improve their immunity.