Patients with thyroid nodules are usually able to have a CT test. CT examination is a common laboratory test for thyroid patients. In clinical practice, CT examination is mainly used to check the exact location of the nodule, its size, volume and morphology, and also to determine whether there are metastatic lesions in the lymph nodes surrounding the nodule. In addition, if malignant nodules cannot be excluded in some patients with thyroid nodules, enhanced CT examination can assist doctors in determining the nature of the patient’s localized nodules. It should be noted that patients who undergo the examination 1~2 times a year usually have little effect on the nodules. However, if a patient has frequent CT examinations, it may increase the risk of thyroid tumors. Patients with thyroid nodules may undergo CT examination under the guidance of the doctor, but it is not recommended to do it too frequently.