Facial palsy is a paralysis of facial expression muscles caused by facial nerve injury. It manifests as loss of facial expression, crookedness of the corners of the mouth, and inability to close the eyes completely. Many causes can lead to facial palsy, so the treatment of facial palsy involves several clinical specialties. Neurology and otorhinolaryngology mainly treat primary diseases (such as facial paralysis caused by viral infections) to enable patients to recover from facial paralysis, so sudden onset of facial paralysis of unknown origin should first be treated in neurology and otorhinolaryngology. Plastic surgery mainly focuses on the treatment of the sequelae of various types of facial palsy, with the aim of improving and restoring appearance and function. The scope of plastic surgery treatment for facial palsy: early facial palsy (less than 1 year) caused by trauma or surgery, late facial palsy (paralysis longer than 2 years), and sequelae of facial palsy (incomplete eye closure, facial and eyebrow droop). The treatment is mainly personalized to the patient’s specific situation, applying plastic and cosmetic surgery techniques to restore the patient’s appearance and aesthetics as much as possible.