The causes of facial muscle spasm are more numerous and complex, some of them are physiological, and the pathological ones can be roughly classified into two kinds, which are vascular factors and non-vascular factors. Physiological facial muscle spasm can be caused by environmental temperature changes, sudden hot and cold stimulation, affecting the facial nerve, muscle, and physiological spasm occurs, this situation is mostly transient, and will not be frequent or recurring. Pathological facial muscle spasm, including vascular factors leading to facial muscle spasm with vascular compression of the facial nerve is the most common, most of the patients in the clinic appear facial muscle spasm is the facial nerve out of the brain stem area part of the vascular compression, such as the anterior inferior cerebellar artery, cerebellar posterior inferior cerebellar artery, vertebral arteries, and venous blood vessels, and so on. Non-vascular factors can be seen in some non-vascular parts of the occupying lesions, such as the bridge cerebellar angle area has cysts, granulomas, tumors, and so on, which can also be due to its occupying, resulting in mechanical stimulation and causing symptoms of facial muscle spasm. It is recommended that patients with symptoms of facial muscle spasm can first go to the neurology department of the hospital and other related departments for examination, in order to diagnose the cause of the disease, targeted treatment.