Previously called tic douloureux, trigeminal neuralgia (TN) is the most common cause of neurogenic facial pain. Those with TN usually complain of sudden, superficial, sharp, stabbing, or burning unilateral facial pain over the V2 and/or V3 territories of the trigeminal nerve (maxilla and mandible). These attacks usually last seconds and can be triggered by touching or moving the affected area of the face. Unlike most other headache and facial pain syndromes, during TN attacks, the highest intensity of pain is experienced instantaneously at the onset of the attack, and resolves in seconds, with no symptoms between attacks, which are typically experienced daily for weeks to months prior to spontaneous remission for months to years.