Facial nerve inflammation is caused by a viral infection due to a decrease in the body's resistance, leading to inflammation characterized by damage to the facial nerve. Its symptoms mainly include the lightening of the forehead wrinkles on the same side, incomplete closure of the eye, and drooping facial muscles due to lack of nerve support, resulting in facial nerve drooping which can cause symptoms such as skewed mouth corners, spilling while drinking, and drooling. Sequela depends on the symptoms of the disease, the timeliness of treatment, and the timeliness of recovery, but the ratio of symptomatic to asymptomatic cases is typically 50% and 50%. Young people, those with milder symptoms, those treated promptly, those treated appropriately, and those who recover well are less likely to suffer sequelae, and vice versa.