There are 2 types of veins in your leg, deep and superficial. The deep veins of the leg are responsible for moving 90% of the blood from your legs up to your heart. The superficial veins primarily hold blood and move only 10% of the blood toward the heart. When valves in the superficial veins do not function properly, blood cannot be moved toward the heart causing it to pool or collect in the leg veins making the vein bulge and twist, or varicose. Removal of these non-functional, superficial, varicosed veins will improve leg circulation, symptoms, and appearance and may help prevent serious health complications such as skin ulcers, superficial thrombophlebitis, or deep vein thrombosis.