Originally Posted by mrsD

You might want to try Morton's Epsom lotion, now available at WalMart's first aid section.

I use it to take down swelling in my left foot, which comes and goes. Apply only about a quarter's diameter on the instep(top of the foot), not the toe itself, once a day, and only on intact skin. This is a wonderful product, and many of us here use it with success.
Gently rub in. I also put some up the ankle area to help open the circulation to remove that excess fluid retention.
This is what the bottle looks like:


It is $5.98 at WalMart, and near the epsom salts and rubbing alcohol area. If your store does not have it yet, I am sure the pharmacy can order it...as WalMart has it online too.

I do not have RSD per se, but do have peripheral neuropathy, which also causes swelling.