TRIGEMINAL OM 13 30CH USAGE All neuralgias of the face: i.e. tic doloureux. Herpes zoster and post-herpetic neuralgia. BREAKDOWN Peripheral Nerve Endings, Trigeminal Nerve. Peripheral Nerve Endings—are all nerves at the surface of the skin. The Trigeminal Nerve—begins at the temple area and reaches up over the head and down into the jaw and teeth, encircles the eyes and the forehead. DOSAGE In acute pain 6TD, reducing to TDS.