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.
Pregnancy and Hormones. One of the most common causes of excessive swelling in the feet is pregnancy. During pregnancy a woman's body is filled with more blood than usual, which can cause veins to swell or leak blood into the tissues, which leads to swelling, especially in the feet. An imbalance in hormones can also lead to feet swelling.