Some papillary thyroid cancers generally do not need radiotherapy, which is not a routine treatment because papillary thyroid cancers are not sensitive to radiotherapy. However, it is not absolute, and radiotherapy can be carried out under the guidance of doctors when necessary. Surgery is the main treatment for papillary thyroid cancer, supplemented by postoperative endocrine therapy and radionuclide therapy. In some cases, radiotherapy and targeted therapy are also needed. Individualized clinical diagnosis and treatment plan should be formulated according to the different conditions of patients. If the malignancy of papillary thyroid cancer is low, thyroid lobectomy with isthmus resection or total/near-total thyroidectomy is feasible if the cancerous part is still in the gland and there is no lymph node swelling in the neck. If there are already enlarged lymph nodes, lymph node dissection should be performed in the corresponding area. Meanwhile, since papillary thyroid cancer cells have the function of ingesting iodine-131, and the rays emitted by iodine-131 have the biological effect of ionizing radiation, which can destroy the residual thyroid tissues and cancer cells, it can remove the residual thyroid tissues and treat metastatic foci of thyroid cancer after thyroid cancer surgery. If there are bone metastases, etc., radiotherapy can also be used. However, since papillary thyroid cancer is not sensitive to radiotherapy, it is not used as conventional treatment.