Facial palsy syndrome is referred to as facial palsy, also known as facial neuritis or facial nerve palsy, and facial nerve palsy. Known as crooked mouth and hanging line wind in folklore, it is a disease mainly characterized by motor dysfunction of facial expression muscle groups. It is a common and frequent disease that is not limited by age. The general symptoms are crooked mouth and eyes, and patients are often unable to perform even basic eyebrow raising, eye closing and mouth puckering. These diseases can have a high incidence in adolescents because it develops mainly due to the stimulation of temperature changes, such as one side of the face being blown by cold wind and the other side at normal temperature. This is common, such as blowing on only one side of the face when blowing on the air conditioner, and also when riding in a car with the windows open for a long time on one side of the face, which can lead to paralysis of one side of the facial nerve. There are some immunocompromised people, even when brushing their teeth, a long time in cold water dip in one side of the face can cause facial nerve paralysis. Facial nerve paralysis mainly refers to the compression of the facial nerve. The cause of facial nerve compression is edema, which is caused by the rapid proliferation of the herpes virus present in the root of the facial nerve in a cold environment and the lack of blood supply around it, resulting in edema of the facial nerve canal compressing the facial nerve.