When typing on any keyboard, it is important to keep you wrist in a neutral position, not flexed up or down, else you put yourself in danger of repetitive strain injury. Some users find that placing they keyboard on a surface lower than standard desk heigh helps you do this naturally.
Some users find that using an actual mouse, rather than a trackpad, helps make their problems less severe. If your fingers are the issue, a trackball moves many of the fine motor movements to your arm and shoulder muscles instead of your fingers.
Any sensation that does not stop immediately when you stop using your computer COULD be a repetitive strain injury -- there are MANY different types, not just Carpal Tunnel syndrome. Pains or tingling that does not stop when you stop the activity could be serious, and you should investigate with your Physician.