A dilated, enlarged and tortuous isdefined as a varicose vein. Usually the veins present in the legs and feet become varicose. In people prone to varicosity stand upright, pressure is built-up in the lowest part of the body. This causes the valve(s) in the veins, of the limbs, to become incompetent. This results in the venous blood to pool into the ankle by the pull of gravity causing such issues in the legs and feet. Rarelypeople develop non-healing ulcers also!