Mine is also up my arm. my elbow is just on fire today from the storm.
i am currently only on Lyrica and Amitryptelene.
I am trying to not use any opioid's. but everyday i feel worse, and the pain is started to take its toll. I am also young and i just got diagnosed.(all though ive dealt with it for many months) so i dont have a lot to offer, i wish i did. But i am here if you need someone. I have yet to get the burning to completely go away, i was able to use a tens unit for a while but now, my arm is too sensitive. A moist heat pack helps me gets some relief in overall pain, but does not get rid of it. Physical Therapy was gruesome but it did help with ROM, Pain not so much.

Many happy thoughts sent your way!
oh and also,I will say my doctor always says, to pump my hand (flat and then into a fist) periodically through the day. I cant no longer do that but i do wiggle my fingers as much as i can.

Yes, pumping the hand can help, just don't try to go too fast, and pay attention to your pain levels. Remember that your body is going to feel the pain as much or more than your mind will. I made that mistake when I doing therapy after the nerves in my wrist were removed. I was trying to regain some movement in my wrist, so I was moving it (ever so slightly) back and forth thinking 'wow this doesn't hurt.' Until I almost passed out and puked at the same time! I told my therapist about it the next day and she said, "Well your body is still feeling the pain, Silly, don't do that!" So yes, lesson learned...pay attention to what your body is telling you.