Re: Burning in upper left arm
Hi and welcome.
If it does not resolve itself soon he should get it checked. It could be anything from a rotator cuff problem to bursitis or tendonitis in that area. His primary care provider would be the place to start. For now, as long as there is no medical reason that he is not supposed to take an anti-inflammatory, he could try some ibuprofen or naproxen. Both are anti-inflammatory and can help with pain. If it continues he needs to get it checked out.