For patients with trigeminal neuralgia, the initial symptoms mainly include sudden onset of intense pain that stops abruptly. The nature of the pain is generally sharp, resembling sharp stabbing or knife-like pain. In most cases, trigger points are easily formed on the face, commonly appearing around the bilateral nostrils and corners of the mouth as fixed trigger points. Touching these trigger points can easily trigger an attack of trigeminal neuralgia, which lasts for a relatively short duration, typically from a few seconds to several seconds. In most cases, attacks are more likely to be triggered when the patient is tired, fatigued, or under mental stress.