Left arm numb Causes, Diagnosis and Treatment How to Give a B12 Injection: Step By Step Instructions Feeling worse after B12 Injection: Answering concerns. La Vie Med Spa Right Arm Numbness and Tingling: Causes, Symptoms, Treatment Not all pain is muscular., Burning, tingling, stabbing, or electric pain could actually be neuropathic pain meaning the nerves themselves may be involved., Pain that shoots down the arm or leg,