Facial paralysis, also known as facial nerve palsy, can be divided into peripheral facial nerve palsy, central facial nerve palsy and so on. 1. Peripheral facial nerve palsy: Peripheral facial nerve palsy may be related to infection, trauma, cold and other factors, of which cold is the main cause of peripheral facial nerve palsy. Localized trauma and infection are also common, such as mumps, otitis media and tooth extraction. 2. Central facial nerve palsy: The causes of central facial nerve palsy are related to cerebrovascular diseases, such as cerebral hemorrhage and cerebral infarction. In addition, tumors and intracranial infections, such as viral encephalitis, may also cause damage to the central nervous system, leading to facial paralysis. Patients with facial paralysis should go to the hospital in time to see a doctor for treatment after the cause of the disease is clarified and appropriate treatment is given under the guidance of the doctor.