I to have bilateral lower extermity rsd and can say I have many lumbar sympthatetic blocks. none that last. But my foot turns bright red and warm, which gives me more ability to move.
My shots were all 2 to 3 weeks apart, until this last episode. We did one week apart and the first one I had no pain improvement the 2 I had minor improvement. The third one, I got to wear a real shoe for several days, with decreased pain.
Don't give up, try the series. Everything is still early. It would help if she was in occupational therapy.