A bulging blood vessel in the ankle is actually a manifestation of varicose veins. Most varicose veins are caused by blood stagnation in the lower extremities due to venous valve insufficiency, formation of high pressure in the veins, and weakness of the vein walls, causing the veins to show, tortuous, and dilated. In severe cases, oedema, skin pigmentation, thrombosis, bleeding and other serious complications of the lower extremities may develop. Raised blood vessels in the ankle are a sign of mild varicose veins. Usually patients start at the ankle and gradually spread upward, triggering bulging blood vessels in the calf and thigh. The skin and subcutaneous tissues at the ankle are weak, which makes it easy to form the bulge of blood vessels. And here there will be the beginning of the great saphenous vein at the inner ankle and the beginning of the small saphenous vein at the outer ankle, which are the common main superficial veins around the lower extremities. Therefore, there is an anatomical basis for the vascular bulge here. Once a bulge is found in the vessels of the ankle, it should also be treated according to the principles of varicose vein management. As it is relatively limited and not serious, it can be treated conservatively by wearing medical elastic stockings first, and if it spreads to the calf or even the thigh in the future, surgery can be considered.