If facial palsy is not recovered or incompletely recovered, contracture of paralyzed muscles, facial muscle spasm or joint band movement, and crocodile tear syndrome can often be produced as sequelae of facial nerve palsy. The contracture of the paralytic muscle is manifested by the deepening of the nasolabial fold on the diseased side and the narrowing of the eye fissure, which can easily be mistaken for the affected side. However, if the patient is allowed to make active movements, such as showing the teeth, it can be found that the contracted side of the facial muscle does not contract, while the contraction of the healthy side of the facial muscle is normal. Facial muscle spasm is a painless, regular paroxysmal twitching of the facial muscles, often limited to the eyelids or corners of the mouth, which can be aggravated by talking, eating, nervousness, and fatigue. The associated movement is that the patient appears to open the mouth, show the teeth, puff the cheeks, sucking when the eyes also follow the closure becomes smaller, on the contrary when the eyes are closed, the corners of the mouth also pull closed when the patient closes the eyes that occurs when the diseased side of the upper lip slight trembling, the diseased side of the eyes involuntarily closed when showing teeth, when trying to close the eyes, the diseased side of the frontalis muscle contraction. There is also the “crocodile tear sign” when the patient eats and chews (especially strong flavored food), that is, when tears flow down from the diseased side of the eyes.