Thyroid nodules that are too large can be self-examined by visualization, by seeing the nodule move up and down with the thyroid gland with swallowing movements, or by local palpation. It is best to have a doctor perform the examination and make a diagnosis. 1. Visual diagnosis: By observing the thyroid area, with the help of a mirror, stand in front of the mirror, let the neck be fully exposed, and observe whether there is any bulge or swelling in the thyroid area, and whether the neck is symmetrical. Multiple angles of observation are needed. Then do the swallowing action, observe whether there is a lump with the swallowing movement; 2. Palpation: Touch the thyroid gland through the fingertips, feel whether the texture of the thyroid gland is soft, whether there is unevenness and nodularity on the surface, whether the thyroid gland is enlarged or not, and then do the swallowing action to see whether there is any lump moving up and down with the swallowing action, you can palpate the right side of the left hand, and palpate the left side of the right hand with the help of a mirror to observe. Thyroid self-examination is only a preliminary screening, if you suspect the presence of thyroid nodules, it is recommended to go to the hospital thyroid and breast surgery, complete the relevant examinations, to clarify the cause of the disease, and diagnosis and treatment under the guidance of the doctor, to avoid delays in the condition.