Carpal tunnel

This isn’t baby related, but I’m wondering if any of you have dealt with carpal tunnel? I’m a graphic designer so I use my mouse all day and recently I’ve been having wrist pain and constant twitching in my thumb. My thumb will completely seize up through the day too. It’s driving me nuts! I have a mousepad with a wrist rest but don’t feel like it’s helping much. What can I do to help?