When it comes to trigeminal neuralgia, many people may have heard of it, but what causes trigeminal nerve, not many people may know. Auntie Ma, 60, has always been healthy, 17 years ago the right side of the face suddenly around the severe pain, then thought it was a fire, ate some fire medicine, did not expect, the pain is heavier. Every time the pain gets up, there is no strength in the body. Her family took her to a major hospital for examination and she was finally diagnosed with trigeminal neuralgia. Trigeminal neuralgia is a severe pain that occurs in the distribution area of the trigeminal nerve on one side of the face, which is like electric burning, knife cutting and needle stabbing. Trigeminal neuralgia mostly occurs after the age of 40, and more women than men. The pain is paroxysmal and lasts for several seconds or minutes, with the same intervals as in normal people. Trigeminal neuralgia has a “trigger point” and is often triggered by some minor life events that can produce severe pain. Patients are often afraid to wash their faces, eat, rinse their mouths and brush their teeth, and even swallow saliva. Trigeminal neuralgia can be divided into two categories: primary trigeminal neuralgia and secondary trigeminal neuralgia. Primary trigeminal neuralgia is the most common type of trigeminal neuralgia. It is now believed that 80%-90% of primary trigeminal neuralgia is due to the compression and stimulation of the unprotected trigeminal nerve root by tortuous and sclerotic blood vessels. However, secondary trigeminal neuralgia is less well known due to its lesser incidence. Secondary trigeminal neuralgia refers to trigeminal neuralgia caused by tumors, vascular malformations and other occupying lesions. Auntie Ma is suffering from “secondary trigeminal neuralgia”. After the disease, Auntie Ma took “carbamazepine, phenytoin sodium, glutamate” and other drugs intermittently, but at first it was effective, then the drugs did not work and the pain was recurrent. The MRI scan clearly diagnosed the pain as secondary trigeminal neuralgia. It turned out that there was a meningioma of 2cm in diameter compressing the trigeminal nerve at the root of the trigeminal nerve, and it was the “culprit” of the disease. The treatment plan was to “eradicate the cause of the disease” – meningioma resection. After full communication with the family, the meningioma was removed under general anesthesia and the root of the disease was removed. This immediate effect gave the patient a feeling of rebirth. The most important thing in treating trigeminal neuralgia is to “remove the root”! This method of treating the cause of trigeminal neuralgia is effective and has a very low recurrence rate! We remind all trigeminal neuralgia patients to pay attention to finding the cause and be alert to intracranial tumors.