Writing at ErgoBlog, Sicarius provides a summation of his years of RSI-related problems, and how he eventually got his condition under control:
No, it wasn’t magic. It was a visit to a doctor for other unrelated (or so I thought at the time) problems. She had me tested for food allergies, and I came up positive for sensitivities to gluten and dairy (and a few lesser ones). It was hard to give up these foods, which show up in nearly everything, but one of the benefits was that my hand problems gradually diminished. Eliminating the allergy foods also helped me get rid of my other issues (I was having heartburn at night, insomnia, headaches during the day, and needed an inhaler for asthma).
So, for those of you suffering from Carpal Tunnel Syndrome or other joint issues/RSIs, it’s probably worth a trip to the doctor to get tested for food allergies. It doesn’t take much time or cost much (I think I paid about $125 for a blood test that checked for allergies to close to 100 common foods), and it may make a world of difference.