Thyroid nodules usually require surgery after they exceed 3cm. If the nodule is large, benign and without pressure symptoms, it can be reviewed regularly; if the nodule is malignant, surgery is required regardless of the size of the nodule. As the nodule is larger than 3cm, it may compress the esophagus, causing difficulty in swallowing. They may also compress the trachea, causing discomfort such as breathlessness. Therefore, thyroid nodules that are larger than 3 cm usually require surgery. If the nodule is benign and has no compression symptoms, it can be reviewed regularly; no matter how big the nodule is, once it is determined to be malignant, it should be treated with surgery. Post-operative precautions for patients mainly include avoiding strenuous activities in the neck, needing to control diet, controlling iodine intake, maintaining a good mood, paying attention to rest, and maintaining good living habits. In addition, it is recommended that patients with thyroid nodules go to the hospital in time and follow the doctor’s instructions for treatment to avoid delay.