MRI done and two surgeries this past year for cubital and carpal tunnel to relieve that. I do relaxation techniques, light stretching, hot showers and heated mattress pad are wonderful.
i have to ask, were the surgeries on the same arm? and if so, has anyone looked at your neck? Nerve impingement/irritation in the neck can cause the same symptoms as the above problems, but the problems are actually starting in the neck (ask me how I know this)
I also have problems with overly tense muscles, and frequently have tension headaches from it... I know this is going to sound silly to many, but many years ago I took a Lamaze class when I was pregnant with my first... and the techniques taught in that class I still use to this day.. the mindful, deliberate tensing and releasing of individual muscles, the breathing exercises, etc..
the muscle work needs to be done when you can be relaxed (as much as possible) either lying down, or perhaps in a recliner..
try to relax your body as much as you can, then starting with your toes, deliberately tense the muscles, one group at a time, hold it for a couple of seconds, then relax - repeat 2-5 times, then move to the next muscle group, working your way up the body and out to the hands - and dont forget to breathe!! lol.. It takes a fair bit of concentration to focus on just one muscle group at a time, but when you are done, you are usually far more relaxed than when you started.
Focused breathing can also help one relax - focusing on breathing in slowly thru the nose, exhaling slowly thru the mouth. It is all about being slow, calm and deliberate.