The presence of a small amount of blood flow in a thyroid nodule may be normal, but it is necessary to combine with other ultrasound findings to assess the benign or malignant nature of the nodule. The benign or malignant nature of a thyroid nodule is determined by the ultrasound description, including the size of the nodule, whether the border echoes are homogeneous, whether the blood supply of the nodule is rich, whether the border is clear, and whether there are pitting calcifications, etc. The thyroid gland itself is a blood-rich organ. The thyroid gland itself is a blood-rich organ, and there may be a small amount of blood flow in benign thyroid nodules. A small amount of blood flow may be normal, but it is necessary to combine it with other ultrasound findings to evaluate the benign or malignant nature of the nodule. If a thyroid nodule is detected on physical examination, it should be seen in a hospital.