nerve pain from tense muscles

I've been getting pains and tingling in my arms and legs (but particularly in my arms) for the last few months. The theory at the moment from my physiotherapist and doctor is that there is 'neural tension' - ie muscles (particularly in my neck which are very tight) are compressing the nerves. When the physio twists  my arms in certain positions it triggers pain and tingling in the fingers. She's given me exercises to do which haven't really done anything, but some neck massage/stretching definitely seems to help. Has anyone here had anything similar and have any suggestions?

Thanks

Laura