Sodium is known to raise blood pressure (and sometimes greatly), so doctors generally recommend limiting it. Check with your healthcare professional before you up your intake -- if you consume an amount that's not good for you, it can lead to heart failure (especially if you're older).
Other possible causes for foot, leg, and ankle swelling include certain medical conditions or body changes, such as: Natural hormonal changes: Fluctuating levels of estrogen and progesterone can cause reduced circulation in the legs, resulting in swelling.
What causes foot pain? Sometimes pain is caused by a callus that forms on the bottom of your foot. A callus is a buildup of skin that forms in response to excessive pressure over the bone. Normally a callus is not painful, but the buildup of skin can increase pressure and eventually make walking difficult. Shoes that don't fit properly can cause foot pain. Tight shoes squeeze the foot and increase pressure; loose shoes let the foot slide and rub, which creates friction.