Facial muscle spasm, also known as facial muscle twitching. It is a condition of involuntary twitching of the half side of the face. The twitches are paroxysmal and irregular, varying in degree, and may be aggravated by fatigue, stress, and voluntary movements. It starts from the orbicularis oculi muscle and then involves the whole face. Characteristics of facial muscle spasm: 1. Involuntary twitching that cannot be controlled by voluntary will. 2. It is aggravated by stress or fatigue, emotional excitement, alcohol consumption, etc. 3, starting from the lower eyelid, gradually radiating to the whole face. 4. There are no other signs and symptoms. 5. CT or MR examinations usually have no positive findings. Treatment: 1. Conservative treatment is basically ineffective. 2. Microvascular decompression can be curative. The degree of facial muscle spasm varies in severity. According to Cohen and Albert grading criteria, the degree of area twitching can be divided into five grades for your reference only: Grade 0: no spasm. Grade 1: external stimuli cause increased transients Grade 2: eyelids and facial muscles vibrate slightly, but have affected the patient’s image, especially when excited and see strangers seizures are obvious. Grade 3: pronounced spasticity with slight functional impairment, mostly involving the corners of the mouth and difficulty opening the eyes. Grade 4: severe spasm and dysfunction, difficulty in opening the eyes, crooked corners of the mouth, may involve the neck muscles, and seriously affects daily life.