believe it or not swelling in the legs your kidneys your kidneys what balance the sodium and the water levels in your body so it's an indication that the kidneys aren't very happy so what you can do you can increase your water intake and salt intake now when the legs swell do not that means the water is not getting inside the cell it's on the outside of the cell and our cell has a by-line membrane around it water cannot get in unless magnesium is there magnesium will pull the water inside the cell and that's why a crystal of whole salt on your tongue before every glass of water it gets the water into the cells the quickest way to hydrate a body