Someone did say something about an impinged shoulder and that was over the phone and did not tell me what that may include. Does and impinged shoulder have the same same terrible pain that the rsd does? It wakes me up at night with pain. I will be sleeping finally and then all of a sudden i will jerk a terrible jerk enough to wake me up, kinda scary some times it is just me or the drugs or is this another side effect of rsd or could this could a sleeping nerve still from surgery that some have also said.