Oral magnesium supplements do not get into tissues where there are problems with edema and/or blood flow. Using a topical is much much better.

I've been using the Morton's Epsom lotion (new) from WalMart which has it for a very low price of $5.98...with great success.

This opens up the circulation in the micro areas, allows toxins to leave your feet (swept away) and nutrients and oxygen to get into those tissues better. Also the magnesium in the lotion will be absorbed a bit and work on the pain receptors, called NMDA , which magnesium antagonizes. Magnesium also helps stop cramping.

It is well worth a try, for $5.98...I think it is a miracle solution, myself! Some of us here use it with great success.
A quarter's dollop on the top of each foot, and up the ankle, each day, on intact skin. You should see results within a day, in fact.

http://www.mortonsalt.com/for-your-h...-epsom-lotion/

It is in the first aid section of the store. Not many other places have this yet, locally. But Amazon does, for $2.00 more.