In the treatment of varicose veins, accurate diagnosis through ultrasound examination is very important. Recently, major academic societies have previously reported guidelines for ultrasound examination of varicose veins and have been continuously revising and publishing them. Referring to these major reports, domestic academic societies in the Republic of Korea related to the treatment of varicose veins have also published guidelines for ultrasound examination of lower extremity insufficiency and varicose veins. In addition, various related academic societies and institutions in the United States and Europe have made detailed recommendations on the technical aspects of ultrasound examination of lower extremity venous insufficiency and varicose veins. Medical technician associations related to ultrasound examination have also established their own guidelines for examination methods, etc. If an accurate diagnosis is made based on these guidelines, better treatment results for lower extremity varicose veins can be expected.