There are three branches of trigeminal nerve, the ophthalmic, maxillary and mandibular. The
pain of
trigeminal neuralgia occurs almost exclusively in the maxillary and mandibular divisions. One most commonly feels pain in the maxillary nerve, which runs along one’s cheekbone, most of the nose, upperlip, and upper teeth. Next affected is mandibular nerve, affecting the lower cheek, lower lip, and jaw.