Facial palsy is a symptom that occurs in the course of other diseases, including central facial palsy and peripheral facial palsy, with central usually secondary to cerebrovascular disease and peripheral usually secondary to idiopathic facial nerve palsy. Peripheral facial palsy is more common. The symptoms are: paralysis of facial expression muscles, disappearance of forehead wrinkles, enlargement of eye fissures, drooping of the corners of the mouth, drooping of the corners of the mouth and skewing of the face are more obvious when smiling or showing teeth, and the affected side cannot make movements such as frowning, frowning, closing the eyes, puffing and pouting; when puffing the cheeks and whistling, the affected side of the mouth cannot close the lips because the affected side cannot close the mouth. When eating, food residues are often retained in the gap between the teeth and cheeks on the affected side, and saliva often flows out from that side; because the tear dots follow the lower eyelids, the tears cannot drain normally and spill out. Depending on the site of facial nerve involvement, it may be accompanied by loss of taste in the anterior 2/3 of the ipsilateral tongue, auditory hypersensitivity, and impaired tear and salivary secretion. A few patients may experience discomfort in the lips and cheeks of the mouth. Some patients may have ipsilateral corneal or conjunctival injury secondary to reduced or delayed eye closing movements and incomplete eye closure, with symptoms such as eye redness and swelling. Central facial palsy is a paralysis of the face below the eye fissure, without the loss of frontal lines. It is only manifested by the crookedness of the mouth and eyes, salivation, shallowing of the nasolabial folds, and weakness in closing the eyes, which is obviously different from peripheral facial palsy, and the lesion sites and treatment methods are also very different. In conclusion, if you find that you have facial palsy, you should go to a regular hospital in time, so that the cause of facial palsy can be clarified and appropriate treatment can be used to effectively shorten the recovery time.