The severe pain in the face is originally trigeminal neuralgia, experts informed that trigeminal neuralgia is a common clinical disease, the current incidence is about 10-180/100,000, the disease is most likely to middle-aged and elderly people. There are no obvious signs before the attack, and each attack lasts from a few seconds to one or two minutes. The pain can be triggered by the movement of the mouth, tongue or external stimuli, and often has a “trigger point” (i.e. the pain is triggered by touching a part of the face), mostly in the lips, nose and inside the mouth. For fear of causing pain, some patients do not wash their faces, speak cautiously, and eat less, resulting in facial dirtiness, physical weakness, and mental depression. The pain attacks periodically, and the pain-free period is gradually shortened, which finally seriously affects patients’ eating and rest. Trigeminal neuralgia also causes a series of disorders of physiological activities such as respiratory system and digestive system, and increases the incidence of cardiovascular diseases, so patients should be treated in time to avoid delaying the disease. The real cause of trigeminal neuralgia is that the trigeminal nerve is compressed by the surrounding cerebral blood vessels in the cranium. There are many ways to treat trigeminal neuralgia, but most of them treat the symptoms but not the root cause. The most effective method now is microvascular decompression, a procedure in which the responsible blood vessel compressing the trigeminal nerve is found under a microscope and isolated from the trigeminal nerve root.