Got carpel tunnel pretty well sorted now, once you can get passed the gate keepers. If it works well anyone waving fivers near you will not be safe! Mum used to get folk to treat before they had the op really sorted and had mixed results after Physio. Its certainly true that those who did not follow advice had more troubles. She then suffered from it herself, but was sorted successfully.
If you begin to get a third finger that will not extend flat with the rest of the hand on extension of muscles, this is a sign of Viking heritage. Seems the Scandinavians have a dodgy gene that pulls the tendon short as you age. Thus it is more common in the Wirral, Solway, North East coast and East Anglia, where the Vikings settled. Not a lot of people now that!