Hi, sharke. When I practice regularly and warm up properly it's not as bad as it used to be but I need to get back into a regular routine. What's happening now is I'm kind of all over the place (as is probably apparent from my posting patterns). I go through long periods of studying, writing (like werds... not music), mixing/editing or just dealing with meatworld bullcrap. Then, like what has happened these past couple days, I go on a guitar bender where I play aggressively for hours as if I hadn't taken a break. Doesn't hurt as I'm doing it but then I wake up in the middle of the night with my arms on fire.
What I need to do is remember to... well stay practiced up ideally but other than that if I go into spazzo mode make sure I ice and heat my arms before bed even if they don't hurt and do my fancy hand stretches given to me by a physiotherapist many years ago when this first started happening.
Things on my arms really screw me up and make things worse. I can't where watches, wristbands, jewellery or anything because it digs into my tendons. Even shirtsleeves cause problems (even t-shirts). In fact, and this is going to sound weird but it's true, I can hardly wear any clothes for long periods because it causes pain and muscle issues. I pretty much live in my underwear and a loose sleeveless shirt because of it.
So... yup. I'm pretty much sitting here in my gitch as I talk to you guys day in and day out.
Don't worry though. I ain't giving myself any "blisters" as I do. lol