Thyroid nodules and lung nodules are not necessarily related to each other. Among them, thyroid nodules mainly need to be identified as benign or malignant. If for benign thyroid nodules, regular review is usually sufficient. If the ultrasound suggests a thyroid nodule that tends to be malignant, further fine-needle aspiration will be required, and if the diagnosis of malignancy is clear, further surgery will be required. If inflammatory nodules or proliferative nodules are considered, close follow-up is needed; if atypical hyperplasia is considered, close follow-up is needed. Pulmonary metastasis is also seen in thyroid cancer, but after all, it is relatively rare. Most of the pulmonary nodules are primary inflammatory nodules and the two are not necessarily correlated, so a visit to thyroid surgery and thoracic surgery is needed to evaluate thyroid nodules and pulmonary nodules separately.