Facial pain is mainly caused by trigeminal neuralgia. The trigeminal nerve is one of twelve pairs of cranial nerves, named because it divides into three branches as it exits the skull. The three major branches are the ophthalmic nerve, maxillary nerve and mandibular nerve. Branch I is a sensory nerve innervating the frontal region of the eye, branch II innervates the maxillary and facial regions, and branch III innervates the mandibular region. The diagnosis of trigeminal neuralgia is mainly based on the clinical manifestations of patients, and generally no special auxiliary examination is required. When secondary trigeminal neuralgia is suspected, a targeted etiological examination should be performed. The main diagnostic points of trigeminal neuralgia are as follows: 1. The pain site is the distribution area of the trigeminal nerve or its branches. 2. Most of the patients have sudden onset of severe pain, while most of them have no pain at all when they do not have an attack, and very few of them still have mild pain. Most of the patients have “trigger points”, i.e., trigger points, which can cause painful attacks, but the attack has just passed, and then stimulating the “trigger points” will not cause attacks. 4.More than 95% of patients with trigeminal neuralgia are one-sided. 5.The pain attack is not accompanied by nausea, vomiting and other symptoms. What kind of medication do you take for trigeminal neuralgia treatment? Is taking medicine effective? At present, microvascular decompression is the treatment method for the cause of trigeminal neuralgia, and it is also the safest and most effective method internationally recognized for the treatment of trigeminal neuralgia.