Right shoulder and entire arm burning-muscle/fatigue type pain through tricep and top of forearm when used, with weakness in ring and pinky fingers?

Low cervical prob. Either of 2 possibilities. 1) ulnar nerve compression in the arm or elbow; this would cause numb ring (4) and pinky (5) with weakness in grip. 2) low cervical nerve pressure; would cause symptoms of triceps and forearm and numbness in fingers 4&5. Good exam likely to differentiate, but if in question MRI or emg/nerve conductions would be helpful.

Related Questions

What nerve (s) innervate the shoulder/tricep/top of forearm and ring/pinky fingers? Arm is burning and tight, fatigues easily after use. Pinched nerve?

See below. Digits 4 and 5 involve ulnar nerve, most of shoulder girdle involves upper brachial plexus (c-5, 6), triceps radial nerve or c-7, but you may be experiencing lower plexus issues, caused by thoracic outlet syndrome. Worth exploring further, as diagnosis could lead to successful treatment. Read more...
Exam needed. Unlikely a single pinched nerve. Neuropathy, parsonage turner syndrome, thoracic outlet syndrome etc. Come to mind but exam is needed and next steps depend on the clinical signs. Neurology consultation and electrophysiological workup may help but see your primary doctor first to see what's going on. Read more...