Varicose veins are difficult - some would say impossible - to prevent. At the very least, you can help to relieve them.
Keep your weight down and exercise regularly. Walking is an excellent choice, as it improves leg and vein strength. Avoid tight or constricting clothing and, if necessary, wear elastic support stockings to cushion the veins.
Never cross your legs when sitting and avoid heavy lifting. Try not to stand or sit for prolonged periods and elevate your legs when resting. If you must stand excessively, keep shifting your weight from one leg to the other. When flying, request an aisle seat in order to be able to get up and walk the aisles once or twice an hour.
Lower your salt intake to prevent swelling. Constipation contributes to varicose veins, so be sure to eat plenty of high-fibre foods. Include alfalfa sprouts in your diet, as they are a good source of vitamin K, which strengthens the vessel walls. Drink fresh fruit juice each day, as the vitamin C in it builds up the collagen structure in the vein walls. Horse chestnut and butcher's broom may help reduce swelling, beef up veins and benefit the circulatory system.
Avoid scratching the itchy skin above the veins, as it can cause ulceration and bleeding. After bathing, apply an emollient such as castor oil directly over the problem area and massage it into your legs from the feet upwards, towards the heart. Apply sunblock to your face to prevent superficial spider veins.