My RSD started in my foot. It was only in my foot until I had a hip replacement. Then it spread thru out my body. I would really proceed very carefully before having any more surgery. The pain in my replaced hip is different from the RSD pain. The hip pain is more like stiffness and feeling the prosthetic. The RSD pain in more nervy - shooting - temp changes -muscle wasting etc....

Hope this helped

Debbie