In addition to the common triggers of cold behind the ear, wind, and exertion, the causes of facial paralysis should also be considered whether they are due to infections, tumors, cerebrovascular disease, trauma, poisoning, metabolic disorders, and vascular insufficiency. Usually, attention should be paid to exclude herpes of the ear, diabetes mellitus, otitis media, mumps, parotid tumor, acoustic neuroma, primary cholesteatoma, jugular bulb tumor, basilar artery aneurysm, skull base tumors and other diseases secondary to the cause. Both the tumor itself and surgical removal of the tumor can cause facial paralysis. Those caused by cerebrovascular disease are central facial paralysis and need to be excluded by radiographs. Facial trauma, surgery and injection of neurotoxic drugs in the distribution area of facial nerve such as alcohol, penicillin and botulinum toxin are the most common traumatic causes of facial paralysis. Attention to timely diagnosis and symptomatic management is necessary to avoid delay.