Do Vitamin B12 Injections Hurt Feeling tired? Hands or feet tingling? Numbness or nerve pain? Try our Vitamin B12 (Mecobalamin) Injection Only RM165! Repairs nerve damage (great for diabetic nerve pain) If you have a low vitamin B12 level, injections can go a long way toward improving your health and well being. But if your B12 level is normal, don't fall for claims that B12 Injections for Energy: Benefits and How It Works AZ IV Medics