Many patients are in severe pain because of trigeminal neuralgia, glossopharyngeal neuralgia, or because facial muscle spasm seriously affects their daily work and life and urgently require a cure for the disease, but they are always worried and afraid at the mention of surgery, always thinking that the surgery will have to open the skull – “to make an incision in the brain “, and eventually often do not dare to accept surgical treatment, especially for patients with relatively mild symptoms. In fact, this is a misconception. Microvascular decompression surgery is a very mature surgical technique for the treatment of trigeminal neuralgia, glossopharyngeal neuralgia, facial spasm and other cranial nerve diseases, and has been used in clinical practice for nearly 60 years. Moreover, the surgery is not performed inside the brain, but is performed using the gaps in human tissues, in the subarachnoid space between the brain tissue and the skull, and microvascular decompression is the procedure of compressing the nerve root Microvascular decompression is a treatment method that separates the blood vessel (the cause of the disease) from the nerve root and then relocates and fixes it at a site far from the nerve root to achieve complete decompression of the nerve root and obtain treatment. Therefore, in theory, the risk of surgery is not high for an experienced neurosurgeon. Especially in recent years, the progress of microsurgery technology, the application of minimally invasive surgical techniques and the update of surgical equipment have not only significantly improved the surgical efficacy, but also greatly reduced the surgical risk. Microvascular decompression surgery is currently the international first choice for the radical treatment of trigeminal neuralgia and facial muscle spasm, and its biggest advantages are the treatment for the cause, high rate of complete cure and efficiency of pain, low recurrence rate, few complications, and the ability to The normal function of the nerve can be preserved after surgery. Of course, microvascular decompression is not without any risk. The degree of risk depends on whether there are abnormalities in the development of the local anatomy, the number and thickness of the compressed vessels, and the relationship between the vessels and the nerve roots. Therefore, the higher the number of compressed vessels, the thicker the vessels, and the heavier the adhesions between the vessels and the nerve roots, especially in a few patients with anatomical variations, are the main factors that increase the risk of surgery. Therefore, detailed pre-numerical evaluation and skillful surgical technique are the keys to improve the surgical efficacy and reduce the surgical risk. In general, this surgery is quite safe, but after all, it is an operation on the head, and the common risks of the surgery are as follows: 1. Facial numbness, which rarely occurs after this surgery, and even if it does, it is temporary and will gradually recover after the surgery. If the nerve is partially cut, there will definitely be numbness after surgery, but this is a different kind of surgery. 2. Tinnitus and hearing loss: Because the auditory nerve and trigeminal nerve are close to each other, the microvessels on the auditory nerve may be stretched during surgery, and sometimes this strain may lead to hearing loss and tinnitus. More than 90% of this tinnitus and hearing loss can be recovered after surgery. Only very few have long-term complications. 3.Wound and intracranial infection, the incidence is low. 4.Intracranial hemorrhage: including intracerebral hematoma and subdural hematoma, the former has many causes, the latter may be related to the collapse of intracranial brain tissue to make small vein avulsion. 5, subcutaneous fluid: mostly caused by poorly closed dural sutures, which is generally not very relevant. 6, cerebrospinal fluid nasal leakage: there must be two conditions, one is that the patient has obvious cranial pneumatization behind the ear (well-developed mastoid air space), and the mastoid air space is opened and not closed tightly during the operation, and the second is that the dural suture is not completely closed. After the occurrence of some patients need to open the wound to re-open the mastoid air chamber. 7.Other things are fever, diplopia, etc. 8, life threatening, mainly because the patient originally had heart disease or cerebral vascular sclerosis, or intracranial and aneurysm of the large arteries, as well as the original patient has potential more serious diseases, etc., due to the surgery itself is extremely rare. Therefore, it is important to choose a regular hospital for treatment.