A lady I worked with was having issues with her wrist and she changed to a vertical mouse. She said it really helped her. I’ve not met anyone else that uses one.I am considering one as I am having some issues with my right hand. Any thoughts as to if it would help? Also how do they feel, as far as comfort goes?
Actually, you should see a doctor first. The right hand issues may not be "mouse related" at all.
Comfort is subjective so you may need to experiment a bit with different mice, wrist rests, and other ergonomic solutions.
And some solutions could prove even more harmful over time.
Still you need to obtain a professional diagnosis before doing anything.