Varicose veins are twisted, enlarged veins. Any superficial vein may become varicose, but the veins most commonly affected are those in your legs. That's because standing and walking upright increases the pressure in the veins of your lower body.
When the blood flow in superficial veins of lower limbs become defective either because of incompetent perforators or valves in veins, they become dilated and tortuous, known as varicose veins. Varicose veins are large, swollen veins that often appear on the legs and feet. They happen when the valves in the veins do not work properly, so the blood does not flow effectively. The veins rarely need treatment for health reasons, but if swelling, aching, and painful legs result, and if there is considerable discomfort, treatment is available.
Operative management requires subfascial ligation of incompetent perforators and Trendelenberg's operation if there is incompetent SFJ also. Operative management of varicose veins gives good and long-lasting results.