It is possible for thyroid cancer to form within a year. At present, the cause of thyroid cancer is still unclear. Current research shows that the development of thyroid cancer may be related to ionizing radiation, iodine intake, gender, family heredity, thyroid disease, etc. Patients who are exposed to the above risk factors may increase the risk of thyroid cancer. 1. Ionizing radiation: For people with long-term radiation exposure, the risk of thyroid cancer will be increased, and even thyroid cancer may appear within one year. 2. Iodine intake: People who consume too much iodine or too little iodine are also at increased risk of thyroid cancer. 3. Gender: The prevalence of the disease is higher in women than in men. 4. Family heredity: some thyroid cancer patients have family aggregation. 5. Thyroid diseases: patients with adenomatous goiter, hyperfunctional goiter, thyroid tumor, etc. have a much higher incidence probability than the general population. It should be noted that thyroid cancer patients can reduce the adverse effects of the disease through “early detection, early diagnosis and early treatment”, and many patients may survive for a long time, so it is recommended that patients set up the confidence in treatment and actively cooperate with the treatment, so as to improve the quality of life and prolong the survival time.