Thyroid nodules are generally common with blood flow signals, which are mostly described in clinical among thyroid ultrasound. The following aspects are generally considered when this occurs: 1. Thyroid nodules are generally associated with local inflammation, or subacute thyroiditis, which are found at the time of ultrasound probing, forming a nodule with significant blood flow signals in the periphery and are relatively abundant. 2. It can be seen in thyroid nodules complicated by hyperfunction, which is A common clinical symptom of hyperthyroidism will be found on ultrasound probing with the appearance of a distinct blood flow signal at the nodule in the form of a flame-mouthed emanation. This is typical for diagnosing nodular goiter with hyperthyroidism.3 Some malignant thyroid glands, i.e. thyroid cancer, may also show significant blood flow signals around the thyroid nodule with abnormalities such as calcification, which provide a good adjunct to the diagnosis of the nature of the thyroid nodule.