I have skin tenderness. this is new. it feels like a burn on my forearm but nothing is there. it's tender to the touch. what could it be?

Any neck problems: Sounds like some sort of nerve irritation. Could be arising from a condition in or near the exit of spinal nerves from the spinal column. Possibility is an early symptom of shingles. I would see a dr. For this problem. Possible symptomatic treatment would be anti-epileptic meds like Lyrica (pregabalin) or neruontin or a snri like nortriptyline, effexor, cymbalta. You need to find out what is causing pain.