Thyroid nodules are a frequent and common disease of the endocrine system. The prevalence of thyroid nodules is relatively high, with a prevalence of 3% to 7% of thyroid nodules obtained by palpation and 20% to 76% of thyroid nodules obtained by high-resolution ultrasound in general. Thyroid nodules are scattered lesions caused by abnormal localized growth of thyroid cells. 5% to 15% of thyroid nodules are malignant, i.e., thyroid cancer. Most patients with thyroid nodules have no clinical symptoms. When combined with abnormal thyroid function, corresponding clinical manifestations may appear, such as palpitations and excessive sweating in hyperthyroidism, and chills and drowsiness in hypothyroidism. In some patients, due to the pressure of nodules on the surrounding tissues, there are symptoms of pressure such as hoarseness, difficulty in breathing or swallowing. Patients with thyroid nodules should be diagnosed and treated under the guidance of a doctor.