The link above leads to an article detailing research relating to carpal tunnel syndrome. I can also tell you from my own clinic experience that carpal tunnel syndrome responds well to acupuncture. One client a while ago, a young (pregnant) woman, came to see me with very painful symptoms of carpal tunnel syndrome which had developed over a period of a few months…
she had pain in the palm, back of the wrist up to the mid-forearm, swelling of the whole hand, tingling and numbness of all fingers. During the second treatment I was able to reduce the tingling and numbness in the fingers and the pain up the arm by 95% (her statement). She had a total of four sessions and after consistently good results in each treatment, she has not made further appointments.