Facial myoclonus affects patients, and facial myoclonus is a condition of involuntary twitching of the hemilateral face. The twitches are paroxysmal and irregular, varying in degree, and may be aggravated by fatigue, mental stress, and voluntary movements. The onset of the disease begins with the orbicularis oculi muscle and then involves the entire face. What are the dangers of facial muscle spasm if not treated? First, twitching, manifested as irregular, rapid, paroxysmal twitching. At the beginning of the disease, the twitching is lighter and lasts for a short time, just a few seconds, and then gradually lasts for several minutes or longer, but the interval will slowly shorten and the twitching will increase frequently. Second, tonicity will lead to emotional tension, inability to speak, fatigue, inability to open the ipsilateral eye, skewing of the corners of the mouth to the ipsilateral side, alleviating when quiet, disappearing when sleeping, and aggravating when emotional excitement in patients with facial muscle spasm. A few patients may have mild facial pain during twitching, and individual patients may have tinnitus and ipsilateral headache. Third, in addition to the paroxysmal twitching of facial muscles. A few patients may have mild facial muscle paralysis on the affected side in the late stage. Very few patients with facial myoclonus often have the onset on both sides successively, and the main symptoms of facial myoclonus are mostly manifested as one side of the twitching stops and then the other side seizes again, and one side is heavier than the other. The primary facial myospasm is more common in women, and most patients develop it after middle age, mainly manifesting as paroxysmal involuntary twitching of the orbicularis oculi muscle on one side, and then gradually expanding to other facial muscles on one side of the face with the development of the disease, which is the symptom performance of the initial stage of facial myospasm patients. The common cause of facial muscle spasm is due to neurovascular span, so simple medication can not be cured, early patients can be effectively controlled by drugs, long-term use is very little effect, if long-term can not be cured may cause facial nerve damage. At present, the total efficiency of microvascular decompression for facial muscle spasm can reach more than 98%, and there are two kinds of effective patients.