I’ve used a number of mice/trackballs over the years. I do suffer from carpal tunnel in my right wrist so I’ve changed a lot.
For a long time the Logitech Trackman was my savior , the move from standard “wrist resting/pointer middle finger clicking” mice helped alleviate a lot of the pain, and I got really fast with it by throwing the trackball as other people have stated. Eventually the pain returned with this one, was probably my fault but I went looking and found the Anker Vertical that @zoundsabar had mentioned. It was immediately effective at getting my wrist off the table and mostly free from pain. I will say for really long sessions the Anker can start to hurt between the thumb and pointer finger, it’s a bit sharp in there.
I think they’re both good starts if you’re looking to try out vertical or trackball mice. I’ve also done the gamer mice thing and I can say the cloud based Razer software is very customizable but goddammit I AM NOT creating an account to use a mouse, ended up selling it.
Based on this thread I’ve decided to give another track ball a try with the Kensigton Expert Mouse, will report back.