I have RSI (repetetive strain injury) and i've been reading about John Sarno's theory that pain such as this and back pain are what is called Tension myositis syndrome TMS (John E. Sarno - Wikipedia, the free encyclopedia ) basically the pain is from some phscological hang up you have buried and your body gives you an outlet of pain to mask the real cause......

Wondered what everyone thought of this and how it relates to NLP.

I don't know about that theory but Dr Ron Perry would be a very good person to talk to about RSI. I know he has all sorts of ways, using NLP and more, to melt the pain away.