The actual significance of thyroid ultrasound examination: 1. thyroid ultrasound can be a very accurate judgment of whether the thyroid gland has been enlarged. 2. thyroid ultrasound can determine the blood flow and echogenicity of the thyroid gland, which is of great significance in the diagnosis of hyperthyroidism, Hashimoto’s thyroiditis and subacute thyroid. 3. thyroid ultrasound is also of great value in the diagnosis of thyroid nodules. The value of thyroid ultrasound in the diagnosis of thyroid nodules is relatively large. The ultrasound can accurately describe thyroid nodules, their number, size, echogenicity, blood flow, the presence of calcification, and whether the borders are clear. This is some of the significance of thyroid ultrasound examination.