The optimal recovery time for facial nerve palsy varies depending on the cause, age and severity of the disease, but generally the best time for recovery is within 2 months after the disease. Facial nerve palsy is divided into peripheral facial nerve palsy and central facial nerve palsy. In peripheral facial nerve palsy, the location of the lesion should also be distinguished, such as inside or outside the brainstem. Peripheral facial nerve palsy manifests itself as shallow frontal lines on the affected side, inability to frown, inability to close the eyes, shallow nasolabial sulcus, leakage of air on the affected side when puffing the cheeks or blowing the whistle, crooked angle of the mouth to the key side when showing the teeth, and the loss of the sense of taste of the first two thirds of the tongue when facial nerve damage is accompanied. In central facial nerve palsy, it is characterized by paralysis of the muscles below the contralateral ophthalmic fissure. Central facial nerve palsy has different causes and different recovery times. Patients with facial nerve palsy should be treated actively and cooperate with rehabilitation training in the later stage to reduce the occurrence of sequelae.