Ugh man. Yeah, I have similar. My typing fingers that are most used are farked. Got some steroid injections in them and it fixed them up temporarily. Did MRI and other electrical nerve tests and all ok there so it's just like tendonitis and arthritis. I do a lot, a lot of stretching my ligaments and tendons in my arm. I've gone to a crap ton of physical therapy. Just gotta work on it and go to the doc. Put some foam on your flipper buttons maybe.
My wife has some joint issues and does like 45 minutes of stretches and exercise a day for that specifically on top of our twice daily yoga, she's a beast. She was also going to PT 3 times a week and they helped her a lot with various tools and exercises. Hopefully your wonderful country has drastically better healthcare than we have.