Trigeminal neuralgia is a neurospastic pain, a pain state characterized by recurrent episodes of unilateral flank pain. The exact pathogenesis is not known. It has a prevalence of about 4 per 100,000 in the population and is most commonly seen in the elderly, usually at the age of 50-60 years, but can also occur in younger people. The typical form of pain attacks is: sudden onset of pain, pain of a severe nature, the patient usually describes the pain as electric shock-like, pinprick-like or tearing-like; pain process is short, usually seconds to a minute, individual can last for several minutes to an hour; pain attacks as intermittent, the interval between attacks can be several days or even years, the patient is pain-free, but with the development of the disease, pain attacks will become more frequent, the interval between attacks is getting shorter. The patient is pain-free. The pain can involve all three branches of the trigeminal nerve on one side of the face at the same time, but the pain is most commonly located in the lower part of the face, so that many patients mistake it for dental disease and undergo tooth extraction treatment. The pain can be triggered by light stimulation of some specific parts of the face, chewing, loud talking, and even cold air stimulation. As a general rule, once a patient has the disease, it is very difficult to heal itself.