Facial palsy for 20 years still has symptoms of facial muscle weakness that cannot be cured and are sequelae of facial palsy.1. Facial palsy is a very common clinical condition and most patients can recover after timely treatment.2. Patients with idiopathic facial nerve palsy can improve within 2-4 weeks of onset and recover completely in about 3-4 months. In patients with complete facial muscle paralysis, even without any treatment, about 70% of patients recover completely after 6 months of onset.3. If a patient’s facial muscle weakness and facial paralysis have lasted for 20 years, the patient is unlikely to recover. This condition may be related to the fact that the patient had a relatively heavy facial nerve injury at that time or that the treatment was not timely.