How varicose veins are examined depends on the location of the disease. Physical examination, ultrasonography, CT and endoscopy can be performed. Physical examination: varicose veins in the lower extremities occur on the skin surface and can be detected by physical examination. Typically, dilated and tortuous veins can be seen in the medial saphenous vein travel area of the lower extremity, resembling earthworms in shape and more pronounced in the standing position. When the varicose vein is compressed, it feels soft and can be retracted. In case of thrombosis, aseptic inflammation of the surrounding tissues may occur, which is manifested by localized stiffness of the varicose vein with painful pressure. Physical examination: clinically, if the patient has varicose veins in the fundus of the stomach, barium meal and gastroscopy should be done to clarify the degree of varicose veins; if the patient has varicose veins in the lower extremities, ultrasound examination of the veins of the lower extremities or retrograde imaging of the veins of the lower extremities should be done to assess the function of the venous valves and the presence of other lesions such as thrombosis in the veins. In addition, deep vein patency test, saphenous valve function test, and traffic vein patency test can be performed to check the patency of the deep veins and the closure of the valves of the saphenous and penetrating veins, respectively. The diagnosis of varicose veins is not difficult based on clinical manifestations, but it needs to be differentiated from deep vein thrombosis and arteriovenous fistula.