Varicose veins are largely genetic and can't necessarily be prevented, but there are ways to reduce the chances of forming new ones. Exercising regularly improves the circulation and strength of the veins in your legs. Walking and running are great ways to strengthen these veins. Low salt diets may also help reduce vein swelling.
To avoid irritating existing varicose veins, elevate the legs, avoid remaining inert for extended periods of time, and make sure to stay mobile by exercising. Compression stockings can help to slow the growth of varicose veins.