Facial muscle spasm is an involuntary painless paroxysmal twitching of one side of the facial muscles. It begins with occasional throbbing of the lower or upper eyelid, and gradually the episodes become more frequent, extending from the eyelid down to the corners of the mouth, with increased twitching, longer duration, shorter intervals, and more frequent and severe twitching when emotionally excited. It affects the patient’s social and work life. The most common cause of facial muscle spasm is the abnormal position of the small intracranial artery, which forms a collaterally pulsating compression to stimulate the facial nerve, and the long-term friction of the arterial pulsation, which causes the sheath membrane wrapped around the surface of the nerve fiber to be worn out, thus causing the facial nerve function to be disturbed and involuntary facial muscle twitching to occur. In the past, since the cause was not understood, the following treatments were commonly used: 1. drug treatment such as phenytoin sodium or carbamazepine, which aimed to reduce the excitability of the nerve, and the efficacy was not obvious; 2. closed treatment with botulinum toxin A, which inhibited the contraction of the muscle, but also caused facial muscle paralysis, and the efficacy of the drug usually lasted only 2-4 months, and with the increase of the number of injections, the efficacy also The efficacy usually lasts only 2-4 months and decreases with more injections. The best treatment for this disease is now internationally recognized as microvascular decompression, in which the ectopic vessels compressing the nerves and brainstem are located through fine separation under microscopic magnification of more than ten times, and an isolation buffer is placed between the vessels and the nerves without destroying the nerves and vessels. Since the vessel can no longer pulsate to compress the nerve, postoperative posterior muscle twitching can mostly be stopped and neurological dysfunction rarely occurs. This surgical method removes the cause from the root, with fine surgery, little trauma, little bleeding, light injury, fast postoperative recovery, and a cure rate of 97%.