CT examination can usually detect thyroid nodules, but is not the first choice for thyroid examination. Ultrasonography is better than CT or MRI for identifying benign and malignant thyroid nodules, while CT examination is more helpful in determining the relationship between thyroid nodules and surrounding tissues and their extension to the back of the sternum, and it is recommended to choose the examination items under the guidance of a doctor. Neck ultrasound can clarify whether the mass is in the thyroid gland or not, and can accurately determine the shape, size, number, cystic solidity, intra- or peripheral blood flow in the nodule, the relationship between the nodule and the surrounding tissues and structures, as well as the enlargement of the cervical lymph nodes. Ultrasound can also provide risk stratification of the benign or malignant nature of the nodule through a number of signs and guide whether to perform a thyroid fine needle aspiration or the next step in the management of the nodule. If a thyroid nodule is detected, you should seek medical attention and follow the doctor’s instructions for examination and treatment.