Lewis - if it's your wrist in pain, then it's probably a joint problem.
Carpal tunnel syndrome involves nerve compression foremost: either the ulnar or the medial nerve. If it's the ulnar nerve, then the lateral 1.5 fingers may go numb, burn, or tingle with fixed raised postures of the wrist (typically at a singles bar or up against the keyboard). If it's the medial nerve, then it'll be the medial 3.5 fingers (from thumb - count to the ring finger and the inside of the ring finger).
Wrist ache is very common particularly with RSI type phenomenon, although if you're used to riding a sports bike, you'll find that practice reduces strain, whereas if you're doing a tedious screen-desk job, practice is supposed to contribute to RSI.
The surest way to know if you have carpal tunnel syndrome is to see your doctor, rather than ask on a MacApple forum! Just think of the disinformation you'd get if you asked on a Windows forum