The causes of thyroid cancer are still unclear, but there are statistics that the following people are more likely to develop thyroid cancer: 1. have had thyroid cancer in the past or have a history of thyroid cancer in their relatives; 2. have a history of head and neck radiation exposure or radioactive dust exposure when they were children; 3. are women, and women are more likely to develop thyroid cancer than men, and about 7 out of 10 thyroid cancer patients are women; if there are the above High risk factors and accompanied by hoarseness without throat disease, or blood in sputum, or a fast growing neck lump, or signs of dysphagia, you need to check the possibility of thyroid cancer. Regular ultrasound examination of thyroid gland can detect thyroid cancer problems early. Depending on the results of the test, adjust the frequency of review or further tests, such as thyroid puncture, to confirm whether it is thyroid cancer. Although cancer is scary, most thyroid cancer patients have a high long-term survival rate, especially those who are detected early. However, after cure, thyroid cancer still has the possibility of recurrence, which usually occurs decades after the initial treatment. Therefore, patients should have regular follow-up for signs of recurrence, and this regular checkup should continue throughout their lives.