Trigeminal Neuralgia: Relief Technique, Trigeminal Neuralgia (TN) is a chronic pain disorder that affects the trigeminal nerve, which carries sensation from the face to the brain. Often described as TRIGEMINAL NERVE PAIN , Trigeminal Nerve , Starts from the brainstem , Has 3 main branches covering the face , Controls facial sensation and pain signals , Maxillary Branch (Middle Face) Is There a Link Between Trigeminal Neuralgia and MS? Cyanocobalamin (B12) Injection 1000 mcg mL, Multiple Dose Vial 30 mL McGuff