Glenys
I was diagnosed with R.S.D and for 3 years I was in constant pain. One day I happened to rub the back of my knee and the pain went through my foot. It turned out that I had a golf ball size benign tumer at the back of my knee at it was attached to the nerve. Had it removed and have been pain free. Obviosly I had been misdiagnosed by a lot of Drs. No one thought to check any further than the foot. This information may be helpful to someone