There are many causes of peripheral facial palsy, such as disease, surgery, and psychological aspects that may cause facial palsy. 1, Infection: about 42.5%, infectious lesions are mostly caused by the activation of herpes zoster virus latent in the dormant state within the sensory ganglia of the facial nerve. In addition, meningitis, mumps, influenza, scarlet fever, malaria, multiple cranial neuritis, local infections, and otogenic diseases (such as otitis media, labyrinthitis, mastoiditis, and septic inflammation of the temporal bone) can be caused. 2. Idiopathic (often called Bell’s palsy): about 30.3%, Bell’s palsy is caused by fatigue and cold in the face and behind the ear, or by blowing wind. 3, tumor: about 5.5%, the tumor itself and surgical removal of tumors can be caused. Tumors include: basilar artery aneurysm, skull base tumor, auditory neuroma, parotid adenoma, primary cholesteatoma and jugular bulb tumor. 4.Neurogenic: about 13.5%, caused by cerebrovascular disease, intracranial, non-traumatic neurogenic. 5, traumatic: about 8.2%, skull base fracture, temporal bone fracture, facial trauma, surgery and and injection of neurotoxic drugs such as alcohol, penicillin and botulinum toxin in the facial nerve distribution area are the most common causes of facial paralysis in traumatic. 6, poisoning: such as alcohol poisoning. Long-term exposure to toxic substances. 7.Metabolic disorders: such as diabetes, vitamin deficiency. Vascular insufficiency. Psychological factors: Before the occurrence of facial nerve palsy, a considerable number of patients have physical fatigue, lack of sleep, mental tension and physical discomfort.