Trigeminal neuralgia is a recurrent, sudden onset, sudden stop, unbearable and severe pain like electric shock, knife cut and burning in the distribution area of the facial trigeminal nerve. It occurs mostly in middle-aged and elderly people, and most of them are unilateral. There is a particularly sensitive trigger point in the affected trigeminal nerve distribution area, such as the lateral part of the upper and lower lips, the nose, incisors, tongue and cheeks, etc., which can cause painful attacks when slightly touched, and it is figuratively called “trigger point” in medical science, just like the trigger of a gun, which can be triggered immediately. Therefore, even in the interval when the pain is not attacking, patients are afraid to laugh loudly, wash their faces, brush their teeth or touch their faces, and even eat carefully, thus affecting their appetite. Over time, this causes malnutrition, depression and even mental depression, which seriously affects the normal work and life of patients.