Visible blood vessels in the ankle are actually a sign of varicose veins. The ankle is the beginning of the saphenous vein, and the most common clinical varicose veins in the lower extremities are varicose veins of the saphenous vein. When varicose veins are caused by poor venous reflux, thinning of the vein wall, and venous insufficiency, the majority of patients start at the ankle and gradually progress upward. Therefore, the visible blood vessels at the ankle are the initial manifestation of varicose veins and the precursor manifestation of varicose veins. The inner ankle is the beginning of the great saphenous vein and the outer ankle is the beginning of the small saphenous vein, which are the most common main superficial veins in the lower extremities. Therefore the blood vessels in the ankle are obvious and also need to be treated according to the principles of treatment of mild varicose veins by carrying out avoidance of prolonged sitting and standing, elevating the legs at rest and wearing medical compression stockings to ease their progress. If the symptoms are more obvious, you can take drugs that promote venous reflux. If the blood vessels at the ankle gradually spread upward and form heavier varicose veins, surgery can be considered.