Stinging painful sensations in neck and shoulders. traveling down arms. i also have fibromyalgia. what is this? this happens once in a while.

Muscle/tendon : ? of neck/shoulder "stinging painful sensation" in neck, shoulder, arms. Since is bilateral Thoracic Outlet Syndrome unlikely. Chronic waxing & waning muscle spasm explanatory, especially in fibromyalgia (FM) sufferer; with focal tendinitis at insertion sites on superior scapula spine; which pain feels like a pick insertion. This locus is favored anatomical site of pain cartoon in most FM med ads.