It has been found that post-operative thyroid patients are not very clear about the precautions for post-operative review. The following article is about the precautions for post-operative outpatient review of the thyroid gland: 1, post-operative follow-up time: 1 month after surgery, 3 months after surgery, gradually transition to once every six months, once every year, and finally once every 2 to 3 years. 2.If there is no special explanation at the time of discharge, patients can eat normally after surgery. For patients who need to perform iodine radiation therapy, it is prohibited to eat iodized salt and foods with high iodine content such as kelp, nori, etc. since the beginning of the postoperative period. 3.Preparation before review: Please bring a copy of your medical record or diagnosis certificate or discharge certificate when you review. 4.Post-operative medication: according to the patient’s surgery to determine whether to take thyroxine tablets (eugenol), according to the results of each review and the need to adjust the dose of eugenol to achieve the best results. 5. Review content: routine review of FT3, FT4 and TSH for benign thyroid tumor; routine review of FT3, FT4, TSH and Tg for malignant thyroid tumor, and thyroid ultrasound, nuclear scan and CT examination when necessary. 6. Time of post-operative review: The post-operative review of thyroid gland is usually done 1 month after surgery (from the date of surgery), not more than 1 week before and after, and come to the clinic before 10:30 a.m. during the clinic time (the number of review is large, so please pay attention to the registration queue). 7. The necessity of postoperative review of thyroid gland: Patients with benign and malignant thyroid tumors and hyperthyroidism need postoperative review after surgery. For patients with thyroid tumor, after thyroidectomy, the thyroxine secreted by the residual thyroid gland generally cannot meet their own needs, so it is necessary to understand the thyroid function after surgery to determine whether to perform exogenous supplementation of thyroxine in the body. In addition, there is a risk of tumor recurrence, and we need to monitor it in a timely manner.