Hypoechoic nodules of the thyroid gland are common diseases of the thyroid gland. Generally speaking, treatment varies according to the size and nature of the nodule and its clinical manifestations. First, if a hypoechoic thyroid nodule is larger than 6 cm, the patient will have obvious pressure symptoms, such as difficulty in breathing and swallowing, and it is recommended that the patient undergoes surgery as soon as possible. Intraoperative sections suggest that the thyroid nodule is malignant, and central and lateral cervical lymph node dissection is required to avoid residual cancer cells. If the size of thyroid nodule is small and there is no obvious pressure symptom, ultrasound examination is considered more likely to be benign, and patients are advised to review thyroid ultrasound in about 3 months. If the ultrasound examination reveals a thyroid nodule with blood flow signal, aspect ratio greater than one, calcification and other manifestations. It is suggested that the nodule has the risk of cancer, so it is suggested that the patient should have a fine needle aspiration to clarify the nature of the lesion.