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.
Extensor tendonitis can be acute or chronic. It causes swelling on top of foot, dull aching pain while moving your foot. It may cause discomfort while wearing footwear. In such condition applying ice to the foot may help. Also, pay attention to your shoes and get a pair of shoes that fits comfortably to your foot.