Trigeminal neuralgia is located where the three nerves, the ophthalmic nerve, the maxillary nerve, and the mandibular nerve, are distributed, concentrating on the face, mouth, and jaw. Most patients experience pain only in the maxillary and mandibular nerves, and a few patients experience pain in the ophthalmic nerve. The nature of the pain was transient and recurrent electric shock-like, tearing, and cutting pain. The pain in the ophthalmic nerve is mainly located in the scalp, forehead, upper eyelids, and skin of the nose. The pain of the maxillary nerve is mainly distributed in the skin of the ophthalmic and orofacial clefts, maxillary teeth, nasal cavity and oral mucosa. The pain of the mandibular nerve is mainly located in the temporal region, the skin below the cleft of the mouth, the mucous membranes of the anterior 2/3 of the tongue, and the teeth and gingival portion of the mandible. The cause of trigeminal neuralgia is not clear, and is related to genes, emotions, mental stress, and other triggers. Patients should take care of rest and relaxation, and consult with a doctor for reasonable treatment if necessary.