Eighty percent. According to the information of the National Medical Insurance Bureau, the medical insurance for trigeminal nerve surgery can give 80% of the money to the textile facial nerve. Decompression of trigeminal nerve, also known as microvascular decompression of trigeminal nerve, is a recognized method to treat trigeminal neuralgia (also known as painful convulsion). This operation is suitable for patients who have no response to drug treatment or can't tolerate adverse drug reactions, and its curative effect is superior to other operations such as percutaneous rhizotomy and stereotactic radiosurgery.