The differential diagnosis of facial myoclonus: 1. Habitual facial myoclonus: mostly seen in adolescents, characterized by transient facial muscle movements on both sides of the face that can be controlled. 2. 2, Maggie syndrome: rare, is an extrapyramidal disorder, manifested by involuntary jerking of the face, lips and tongue, also known as eye, mouth and tongue syndrome. 3, hysterical blepharospasm: mostly seen in middle-aged women and above, manifesting as transient, compulsive bilateral eye movements accompanied by other hysterical symptoms.