The clinical symptoms of trigeminal neuralgia are mainly characterized by severe, paroxysmal pain in the area of the face distributed by the trigeminal nerve, typically affecting one side. The pain can affect one, two, or all three branches of the trigeminal nerve. The pain is episodic, resembling cutting, electric shocks, and is sudden in onset and cessation, making it unbearable for the patient. In some patients, actions such as eating, washing the face, or brushing teeth can trigger the pain. Most patients have trigger points, commonly located near the nostrils, corners of the mouth, or upper lip.