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.
There are a few other causes of foot swelling: a) Obesity: obesity can cause swollen feet and ankles due to the excess weight going through the feet b) Prolonged Standing: standing or walking for long periods can lead to swollen feet and ankles c) Gender: edema is more common in women due to the hormone progesterone which causes fluid retention e.g. swollen ankles before menstruation