Here’s the thing…
This is what typically happens with skier’s thumb. I’ve broken both thumbs countless times.
Once you get it, usually it will continue to be a problem. You don’t need super specially ordered braces to prevent it. Just a simple thumb immobilizer from Walgreens or rite aid for $11.99. If it gets to be a real problem buy them. I haven’t had a problem since, and I had it really bad for years and years.
Barely being able to use your thumbs is the downfall, but it outweighs wincing pain every time you fall. I wear em everytime I'm in the park.