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.
Your feet and ankles swell when fluid in the blood escapes from capillaries and accumulates in tissues, a condition known as peripheral edema. Causes range from benign to serious and include being overweight, long periods of standing, lengthy car or airplane rides, warm weather, and menstrual periods.