Complex Regional Pain Syndrome, also known as Reflex Sympathetic Dystrophy

RSD is generally a Tone problem–excessive activation of the autonomic nervous system. There can be a number of different cortical patterns related to the underlying stress response. I would suggest that you do an assessment and see what you find. Base your training on that. Oftentimes pain issues relate to problems with alpha, but it will be important to address not just the symptoms in this case but also the underlying stress drive.

Alpha problems (slow peak, very high amplitudes, poor blocking, frontal alpha) are often the things that unwind the pain.  Identifying the main tone strategies and training to quiet the temporals, shift the balance of alpha and beta side-to-side or front-to-back are the keys to releasing the emotional material underneath it all.