What is Varicose Veins Treatment Exactly? Varicose veins (Treatment) are enlarged, swelling, and twisting veins, often appearing blue/dark purple. They happen when faulty valves in the veins allow blood to flow in the wrong direction or to pool. They occur when the valves in the veins are not functioning properly and the blood is not flowing effectively. The veins rarely need to be treated for health reasons. However, if swelling, pain and leg pain occurs and there are significant discomforts, treatment is possible. Laser varicose veins treatment in hyderabad.