The trigeminal nerve is a mixed nerve, the 5th pair of cerebral nerves and the thickest nerve of the face. It mainly innervates the sensory and masticatory muscles of the face, mouth, and nasal cavity, and transmits sensory messages from the head to the brain. The trigeminal nerve consists of the ophthalmic, maxillary, and mandibular branches, which innervate sensation and contraction of the masticatory muscles above the eye fissure, between the eye and mouth fissures, and below the mouth fissure, respectively. Causes of trigeminal neuralgia Trigeminal neuralgia is a recurrent paroxysmal severe pain within the distribution of the trigeminal nerve on one side of the face as the main manifestation, with abrupt onset and abrupt stop, and the pain is lightning-like, knife-like, burning-like severe pain. There is usually a trigger point, such as talking, washing the face, brushing the teeth or breeze will cause the paroxysmal pain. The pain lasts for a few seconds or minutes, with interictal intervals as normal. Trigeminal neuralgia occurs mostly in middle-aged and elderly people. It is believed that vascular compression of the trigeminal sensory root (TSR) into the pontine zone (REZ) is the main cause. In addition, multiple sclerosis, benign and malignant tumors in the REZ area, arteriovenous malformations, posterior cranial sulcus malformations, focal cerebral infarction, and osteomyelitis of the jaws due to odontogenic infection can also cause trigeminal neuralgia, all of which are relatively uncommon. Preoperative nuclear magnetic examination in patients with trigeminal neuralgia shows vascular compression In recent years, apparent microvascular decompression is the most used method in clinical treatment of trigeminal neuralgia. The efficacy can reach more than 90%, and the recurrence rate is low. The procedure of trigeminal nerve microvascular decompression surgery 1, anesthesia satisfactory patient to take the right side lying, in the posterior breast hairline, about 100px long, routine sterilization lay towel. 2.Cut the scalp and occipital muscle along the drawn line to expose the root of the left mastoid process, the nipple retractor to retract the soft tissue, electrocoagulation to stop the hemorrhage, 3.Drill the hole with the cranial drill, expand the window with occlusal forceps about 50px in diameter, and close the blood of the bone edge with bone wax. The dura mater was cut with a sharp knife, and the dura mater was cut with an inverted T-shape, and cotton sheets were laid around the incision. 4, set up the microscope, microscopic operation. 5.Gently pull the cerebellum, slowly release the cerebrospinal fluid from the medullary pool of the cerebellum, and gradually reveal the trigeminal nerve after the cerebellum collapses, and intraoperatively see the rock vein compressing the trigeminal nerve, carefully separate the vein and pad it away from the trigeminal nerve with cotton pads, and isolate the nerve from the small vessels near the trigeminal nerve with cotton pads. The small vessels close to the trigeminal nerve were isolated from the nerve with pad cotton. The vessels compressed by the trigeminal nerve were completely separated and fixed. 6.Suture the dura, rinse the wound, place the artificial dura, put the bone slag into the bone hole, fix the ear brain glue, and suture it layer by layer. End of surgery.