Facial paralysis for more than one year, the face is always swollen, which may be related to the neurotrophic disorder and local ischemia and hypoxia of the face after facial nerve injury. 1. Neurotrophic disorder: Facial nerve not only has innervation effect on facial muscles, but also has neurotrophic effect. Facial palsy patient’s facial nerve is affected by the lack of nutrition of the muscles innervated by the facial nerve, which will cause edema of the facial muscles, and the face will look swollen. 2. Local ischemia and hypoxia: The normal flow of blood in normal facial blood vessels and the normal contraction and diastole of facial muscles are closely related. After facial paralysis, facial muscle movement is weakened or lost, which will result in decreased vascular smoothness, easily causing local tissue ischemia and hypoxia, which in turn causes local tissue edema, manifested as swelling of the face. Patients with facial paralysis should consult the doctor in time, improve the relevant examination and standardize the treatment.