Karen,
Ooopsie, I forgot to mention. My RSD started in my left wrist and arm and spread to the upper arm, left side of my neck, face then down to my left leg. The nerve block shots were put in the ganglion nerves at the base of my neck. Yours' will probably be different.
My RSD is also effecting my degenerative cerebral atrophy from head trauma which is making a mess of my motor skills, walking and speech...