Thyroid cancer can be classified into papillary carcinoma, follicular carcinoma, undifferentiated carcinoma and medullary carcinoma according to the pathological type. Among them, papillary carcinoma is the most common, accounting for 60%-70% of the incidence, which is well differentiated and relatively less malignant. However, regular review and postoperative endocrine regulation after surgery are still very necessary. The main purpose of postoperative endocrine conditioning for thyroid cancer is to take thyroid hormones. The purpose is twofold: Firstly, most patients will have hypothyroidism after surgery and need replacement therapy with thyroid hormone preparations. The second is that thyroxine can inhibit the fractionation of thyroid stimulating hormone TSH in the anterior pituitary gland, thus playing an inhibitory role in the proliferation of thyroid tissue and the growth of cancerous tissue, which is useful in preventing recurrence and treating advanced thyroid cancer. The mechanism is that through the treatment of L-T4 (levothyroxine) in more than physiological doses, the secretion of TSH in the anterior pituitary gland is suppressed, which inhibits the growth of thyroid tissue and cancerous tissue (TSH receptors are present on the surface of differentiated thyroid cancer cells, and TSH stimulation can increase the expression of thyroid-specific proteins and promote cell growth), thus achieving the goal of preventing and reducing the recurrence of thyroid cancer. About 85% of thyroid cancers are differentiated thyroid cancers, which are low-grade malignant tumors, and most patients can survive for a long time with a 10-year survival rate of 80%-90% after standard treatment. 3. The postoperative follow-up includes whether there is any recurrent lump in the thyroid gland, whether there are enlarged lymph nodes in the neck, careful physical examination, and if enlarged lymph nodes are found, fine needle aspiration cytology should be done in time. 4. Ultrasound can help to understand the original surgical area, residual thyroid gland and neck. Annual chest X-ray should be performed, and serum T3, T4, TSH, anti-TG, and anti-TPO should be checked to understand thyroid function. 5. Patients with total thyroidectomy should be suspected of having metastasis or recurrence if anti-TG is abnormally elevated, and patients complaining of bone pain should have an isotope bone scan to exclude the possibility of bone metastasis. 6. Clinical use of levothyroxine tablets (eugenol) 50-100 μg/d. The starting dose is 50 μg/d morning dose, and the serum TSH value should be checked once in 2-3 months, then gradually increase the dose to control the TSH value at 0.05-0.1 mU/L is better. Based on your recent results, it is recommended that the dosage of Eugenol be temporarily adjusted to 100ug per day and rechecked again after one month. 7. Estrogen plays a role in promoting the occurrence of thyroid cancer. It is found that the higher the level of estrogen in the body contributes to the outbreak of thyroid cancer. Therefore, it should be avoided. For patients with diabetes mellitus, the dose of insulin or oral hypoglycemic drugs should be increased when thyroid hormone therapy is applied. 9. Long-term overdose of thyroid hormone may cause osteoporosis, therefore, attention should be paid to calcium supplementation. 10. In the postoperative maintenance and consolidation treatment after surgery, we also often cooperate with anti-cancer Chinese medicine to prevent recurrence treatment. For example, half-branch lotus granules, snake tongue herb granules, salvia granules, dongling herb, rhizome shell, kiwi root water, etc. (you can search google.com to know their properties). These medicines are cheap and have no significant side effects, and many are also medicinal food products. Most of the patients who are currently on file at our office for follow-up are treated with a combination of Chinese and Western methods, and their condition is relatively stable, and many have successfully passed the 5-year survival period. I think the combination of Chinese and Western methods is worth further exploration and research, for your reference.