If you have osteoarthritis in your hands like I do then I sympathise.My fingers look like knobbly sausages ! I break off if I am using the computer for a while and flex my fingers. I can't cope with the laptop because you sort of have to type level with it if you know what I mean ! I find it easier on the old normal keyboard. Once you have this in your finger joints there is not much you can do.Just try to keep the fingers supple,take a supplement ,cod liver oil or Glucosamine.I do knitting but I have to put that down after a while.Peeling, chopping and packaging drive me to distraction.
Carpal Tunnel sydrome is stretched tendons in the wrists which is different to osteoarthritis although wrist supports might help .You can get the sports ones from Boots.You can get a ball that you can squeeze to keep the fingers supple.
Ha Ha ....bound to be a rude remark in that from someone!!