Same, I had debilitating RSI for years, to the point where I was using voice recognition and a foot mouse, but all symptoms went away once I started wearing hoodies to work. As soon as I use a computer with bare arms though it all comes right back.
Only a few minutes with bare arms and I get this snapping sensation in my forearms as I type. And if I push through, pain.
Doctor's wanted to do surgery. But I didn't have the problem prior to an injury that required me to use crutches, so I was hesitant to resort to surgery.
Keeping my arms covered has been a lower risk solution that's been working fine now for 6 years.