Thyroid nodules are scattered lesions caused by abnormal local growth of thyroid cells. The lifetime risk of thyroid nodules is 15%, while the majority of thyroid nodules are benign and only 5-15% are malignant. Therefore, there is no need to worry too much when thyroid nodules are found during physical examination. The following are the risk factors for thyroid cancer: ① history of childhood head and neck radiation exposure or radioactive dust exposure; ② history of systemic radiation therapy; ③ previous or family history of differentiated thyroid cancer (DTC), medullary thyroid carcinoma (MTC) or multiple endocrine adenomatosis type 2 (MEN2), familial polyposis, certain thyroid cancer syndromes; ④ male; ⑤ nodule Rapid growth; ⑥ persistent hoarseness and dysphonia, with exclusion of vocal cord lesions; ⑦ dysphagia or dysphonia; ⑧ irregular shape of the nodule with fixed adhesions to surrounding tissues; ⑨ pathological enlargement of the lymph nodes in the neck. At present, high-resolution ultrasound is the preferred method to evaluate thyroid nodules, so you can go to the hospital for high-resolution ultrasound again if thyroid nodules are found during physical examination; meanwhile, some hospitals can do thyroid puncture biopsy for suspected thyroid cancer. In general, thyroid nodules only need to be reviewed regularly without a hospital. In addition, most thyroid nodules are less malignant and can be cured by timely surgery, which does not affect life expectancy.