A thyroid nodule surrounded by blood vessels indicates a rich blood supply to the nodule and suggests the possibility of malignancy. Alternatively, benign thyroid nodules such as toxic diffuse goiter or nodular goiter may have a rich blood supply within the thyroid gland. Malignant nodules are generally more serious. 1. Malignant nodules: they grow rapidly and therefore require a large blood supply. In this case, attention should be paid to whether the edges of the nodule are not clear under ultrasound, whether there is lobar or burr sign, and whether it is accompanied by enlargement of the surrounding lymph nodes. If necessary, puncture biopsy of the nodule should be performed to determine the next treatment plan according to the type of pathology, and if it is malignant, surgical resection should be carried out in time. 2. Benign thyroid nodules: Usually, the growth rate of nodules is relatively slow. However, there are some patients with toxic diffuse goiter or nodular goiter, in which the thyroid gland is rich in blood supply and the nodule grows rapidly, and there may be nodules accompanied by blood vessel encircling phenomenon. If the benign nodules increase significantly in a short period of time, accompanied by pressure on the surrounding tissues and organs, and even lead to breathing and swallowing difficulties, nodule rupture, pain, etc., it is necessary to carry out timely surgical removal. Patients who find blood vessels surrounding the thyroid nodule should seek medical treatment in time, clarify the type of disease under the guidance of doctors and treat the symptoms to avoid delaying the condition.