Patients need levothyroxine supplementation after thyroid cancer surgery. The optimal target value of TSH suppression therapy should meet the following objectives: to reduce the rate of recurrence, metastasis and associated mortality of thyroid cancer, but also to reduce the side effects caused by exogenous subclinical hyperthyroidism and to improve the quality of patient survival. For an individual patient, the dose of eugenol for suppressive therapy is the dose required to achieve his or her TSH suppression goal. The starting dose of Eugenol varies depending on the patient’s age and co-morbidities. Determination of the final dose of eugenol is dependent on monitoring of serum TSH. Therefore, it is important to provide detailed surgical records, pathology results, full medical history, and test results at the time of consultation for risk stratification, and for the determination of postoperative follow-up intervals. The maintenance of stable TSH levels is best facilitated by taking levothyroxine tablets on an empty stomach before breakfast. Certain special medications or foods should be taken at sufficient intervals: 1 hour with vitamins, 2 hours with iron- and calcium-containing foods or medications, 4 hours with milk and soy products, and 12 hours with cholestyramine or lipid-lowering resins. Nail clearing treatment with 131 iodine after thyroid cancer surgery: Nail clearing treatment is to use 131 iodine to remove the residual thyroid tissue after thyroid cancer surgery. Post-operative 131 iodine nail clearing for thyroid cancer is beneficial for monitoring disease progression by serum Tg and 131 iodine whole body imaging, and possibly treating potential thyroid cancer lesions. If thyroid cancer can be detected and treated early, the prognosis is generally good and will not affect the quality of life as well as the life expectancy of patients, so do not be overly frightened about it. However, thyroid nodules should be detected and treated promptly to distinguish between benign and malignant nodules, because individual thyroid cancer can still be fatal.