Papillary thyroid cancer is also cancer and has the highest incidence among all thyroid malignancies. Some people say it is not considered cancer because it is a kind of cancer with good treatment effect. Radical resection through surgery, if there is lymph node metastasis in the neck, etc., can be combined with nuclear iodine-131 treatment, and most of the 5-year survival rate can reach more than 90%, which means the treatment effect is very good and no recurrence for more than 5 years is considered clinical cure. After papillary thyroid cancer is treated by surgery, regular monitoring of thyroid function is also required. It usually requires subtotal thyroidectomy or total thyroidectomy + cervical lymph node dissection, which will cause hypothyroidism after surgery and requires long-term treatment with thyroxine tablets, commonly used is Eugenol. The amount of medication should be adjusted according to the results of thyroid function tests.