Oh, sad (and glad) to read! I also had some tendon inflammation in the past (not severe by any means), and they can hurt. That turned me into a fellow vertical mouse user, I can tell you I'm never going back!
What mouse and tablet did you get? My wife is also an artist and I got her a Kamva Pro GT156 V3; she loves that thing. (if you are curious)
Make sure to take your time to properly recover! Also, about time to get that left arm practice!
Your wife is a great artist, congrats!
I've bought an XP-Pen Artist 22EPro, but I found myself struggling too much with the lack of configurable keys (even if this one has 16 of them). The vertical mouse is a standard one, I'm actually using it for when I'm not drawing and it's helping me a lot! The plan is to use my previous mouse only when I have to draw and animate, then I'm gonna switch to the vertical for anything else!
Wrist update: I'm almost ready to start drawing again! I've tried drawing a bit during the last days and my wrist is getting better and better, even if it still hurts after a while!
