The presence of blood flow signals in thyroid nodules can be treated in more than one way, depending on the individual. If thyroid cancer is suspected, ultrasound-guided fine-needle aspiration can be performed to clarify the nature of the nodule, and then surgery can be performed. The presence of blood flow signals in thyroid nodules can occur in many thyroid disorders, such as adenomas, malignant tumors, etc. Therefore, it is not possible to determine the condition of the disease or formulate a treatment plan solely on the basis of the blood flow of thyroid nodules. For the above diseases, there are treatment options such as medication and surgery. Therefore, when the presence of blood flow in thyroid nodules is detected, it is necessary to carry out further other examinations, and if there is no malignant lesion appearing, regular review can be carried out according to the doctor’s advice.