Aqua therapy is the thing to do, seriously. It may not make the pain subside, but it will allow her to exercise
her other muscles, which are more than likely weakening.
She's got a long road ahead, as we all do, but the sooner she gets this under control the better her quality of life will become. I imagine any type of relief will help her at this point. Three years of having RSD before being diagnosed is extreme. Wow. Feel free to give her my e-mail address, Deb.