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.
A swollen foot may be a sign of an injury to the foot or lower leg. Broken toes, ankle sprains, ankle strains, and broken bones are just a few injuries that may result in swelling. Swelling is a normal response to injury. Inflammation facilitates healing. If you are injured so badly that it causes a lot of pain, you cannot put weight on your foot, or the area looks very abnormal, seek immediate medical attention.