If the blood circulation is not good, the legs will swell easily. Eating more foods containing vitamin E can speed up blood circulation. Such as almond, peanut and wheat germ. Eating foods with high salt content often will also accumulate too much water in the body and form edema. At the same time, foods containing potassium can expel excess water from the body. You can eat more tomatoes, bananas, potatoes, celery and so on.