The facial nerve may be trigeminal neuralgia. The trigeminal nerve is divided into three branches: the ophthalmic, maxillary and mandibular branches, which are distributed in a claw pattern and are responsible for facial sensation. Patients mainly show symptoms of recurrent paroxysmal, transient, severe pain without the destruction of trigeminal nerve function. Secondary trigeminal neuralgia may be caused by vasculitis, tumor compression, ischemia, or bleeding, and the pain is continuous. The cause of primary trigeminal neuralgia is unknown, and the specific manifestation is severe pain in the innervation area of the three branches, starting from a certain part of the face, with radiating attacks along the innervation area of the trigeminal nerve, and the nature of the pain can be pinprick pain or cutting pain, and the attack is brief, and can be relieved by itself in a few seconds or minutes, and can be repeated. The difference between trigeminal neuralgia and other head and face pains is the existence of a pain trigger point, i.e., when a part of the face is touched, trigeminal neuralgia is triggered, and the diagnosis of the disease is mainly based on symptoms.