Papillary thyroid cancer is not sensitive to chemotherapy. Generally speaking, patients in the middle to late stage need radiotherapy after surgery, while early stage and even some middle stage patients can be treated without radiotherapy. The prognosis of early stage papillary thyroid cancer is good, and after surgery, the survival rate is about 95% in 10 years. However, one should not think that papillary thyroid cancer is “safe” because of its low malignancy. If it is not detected and diagnosed early and treated in time, the postoperative effect of advanced papillary thyroid cancer will be affected. In addition, even though some cancer tumors are small, if they grow in a bad location and are “tricky”, such as near the laryngeal nerve, the tumor will invade the nerve at an early stage and cause hoarseness, and such hoarseness cannot be recovered even after surgery, which is not uncommon.