Hi, welcome to my world. (g)
As much as I hate to say it, a wrist brace may help you a lot. I know many people call them "crutches" but I'm not a pro bowler -- I bowl for the competition and the fun -- so if I have to use one to alleviate pain, I'll do it and the naysayers can bite me. It's not their wrist, and bowling's not that important compared to your ability to make a living and have good quality of life.
I've gotten into a rhythm now where I can use a brace for two weeks, then bowl "naked" for three weeks, then back to the brace for two, etc. I ALWAYS warm up with the brace on even though it might leave me hunting for the first frame or two of the game. But if you're on THS, it shouldn't matter that early in the first game.
If you're having bothersome pain, though, go see a doctor at least to get a diagnosis. If it's just tendinitis, the only thing that's going to cure it is not bowling (or, at the very least, using a brace). But if you've got bone spurs or a cyst in there, you need to know.
Jess