Facial muscle spasm is characterized by episodic and recurrent involuntary twitching of the facial muscles, and is most common between the ages of 30 and 40. In some patients, the compulsory contraction of the eyelids may cause the lid fissures to become smaller. The disease has a chronic course and can last a lifetime, which has a great impact on the patient’s work, spirit and life. In 99.1% of cases, facial muscle spasm is caused by intracranial vascular compression of the facial nerve roots, resulting in a current “short circuit” between nerve fibers, which causes facial muscle twitching. In recent years, a large number of clinical practices have also shown that once the compression of the nerve roots by blood vessels is removed, facial muscle spasms can be stopped immediately or gradually. Since the cause of facial myospasm is intracranial, the only way to cure the disease is to treat the root of the disease. Microvascular decompression is the only treatment for facial myospasm that targets the cause, and this procedure has become the preferred treatment for facial myospasm internationally. Therefore, microvascular decompression is a safe procedure.