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 collection of excess fluid anywhere in the body is known as edema. Your entire foot or a portion of your foot may appear larger than normal. The swelling may be painless or accompanied by a variety of symptoms, including bruising, itchiness, pain, numbness, redness, stiffness and tenderness. Foot swelling may be a symptom of a condition or an injury affecting the foot or the whole body. The severity of swelling largely depends on its underlying cause. For example, standing or sitting for extended periods may cause minor and temporary foot swelling. Severe swelling may be the result of an injury, such as a broken bone or sprain, or a medical condition, such as heart failure or arthritis.