A thyroid nodule is a mass of abnormal thyroid cells in the thyroid tissue that has proliferated. Because there are usually no obvious symptoms of thyroid nodules, it is common to determine whether you have a thyroid nodule by physical examination and imaging.1. Physical examination: The size, texture, and mobility of the nodule, whether it is adherent to surrounding tissues, whether there is pressure pain, and whether the local lymph nodes are enlarged can be determined by physical examination. In case of malignant thyroid nodules, the texture is generally hard and uneven on palpation, the border is unclear, the shape is irregular, there is no tenderness, the up and down movement is poor when swallowing, the local lymph nodes are enlarged, or there is invasion of the surrounding tissues; 2. The CT examination can observe the presence of nodules, the nature of thyroid nodules, and the relationship between thyroid nodules and surrounding tissues. 3. Laboratory tests: Thyroid function can be detected by testing free thyroid hormone and thyroid stimulating hormone levels. Most thyroid nodules have no clinical symptoms and require the results of the above tests combined with the experience of the doctor to have a clear diagnosis, and it is not recommended that patients make their own judgments about the disease.