Trigeminal neuralgia, also known as painful spasm, is a typical neuralgia that involves the face with recurrent episodes of brief and severe pain limited to one or several branches of the trigeminal nerve distribution, and is considered to be the world’s greatest enemy of mankind and the first pain in the world. The main characteristics: 1. pain: no aura symptoms before the attack, sudden onset, rapid stop, intermittent period completely normal, most patients have more frequent attacks, but there can be weeks to years of remission, but a small number of self-healing, 2. the site of pain: strictly limited to the frontal or facial distribution of one or several branches of the trigeminal nerve, the right side is more, accounting for about 60/%, the pain is mostly centered on the second branch, the second branch alone The pain is mostly centered on the second branch, and the second branch alone is involved in 25/% of cases. The second branch and the third branch are the most affected at the same time, accounting for about 32%-42%, followed by the second or third branch, and the first branch is not more than 5%. 3, the nature of pain: lightning, superficial and sharp sharp pain, often described as knife-like, electric burning, burning sensation or tearing-like pain. 4, the degree of pain: extremely intense, pain attacks with abnormal painful expression, manifested as: rubbing the face with hands to the skin swelling, broken, eyebrows and beard rubbed out; some cry out frequently; some with the head hitting the wall or rolling on the ground; some patients are dazed, seemingly shocked by an unexpected blow, maintaining the original posture, not daring to move. 5.Pain duration: several seconds to 2 minutes. 6.Concomitant symptoms: there may be facial flushing, lacrimation, salivation, and runny nose, etc. 7, trigger point: about 1/3 of patients, the facial trigeminal nerve distribution area of a region is particularly sensitive, the slightest touch can cause a pain attack, this region is called the “trigger point” or “trigger point”, the trigger point is often located in the pain affected branch of the innervated area The trigger point is often located in the area dominated by the painful branch, such as the lips, nose, gums and tongue, etc. 8. Triggers: The attack can be triggered by talking, washing, eating, brushing, vibration, cold stimulation, emotional changes, and other factors. Treatment: 1, drug therapy: oral carbamazepine is effective in about 70/% of patients. 2, CT-guided radiofrequency ablation of damaged nerves.