As a matter of interest I went to an osteopath for a trapped nerve once. The trapped nerve was in my back (it was the sciatic nerve) but the pain was in my leg. It would be fine for ages - I could thump my leg and feel no pain, but if I stretched the skin on my thigh I was in agony - it felt like I'd been stuck in the leg with a large pin. Osteopath sorted it out in two minutes flat. My mum had the same problem, she had a trapped nerve in her shoulder - her pain was different, more constant and even breathing caused her to feel pain. Dr's said it was a pulled muscle. Osteopath again sorted immediately. My only advice would be, as woofgang mentions, to pick one carefully - try to get a referral from a friend rather than pick one out of the phone book. Good luck, hope your wife gets sorted soon.