Hello,
Years ago I woke up with trigger finger in both thumbs. I had surgery on the right because I needed to work. The left, I just happened to ask my chiropractor if there was anything he could do. He did something with gel and a device like an ultrasound instrument, and after about six treatments I was good and it hasn’t returned.
Sorry I don’t remember the name of the process but if you have a chiropractor I bet he would know.