面神经瘫是突发性的单侧面神经功能丧失。近90%的病例尚未找到明确的病因,一般认为面瘫是面神经的炎症和位于颞骨或面神经管内那部分的明显水肿。发生水肿的原因认为是由于骨性面神经管内的血管局部缺血和/或由病毒(包括脊髓灰质炎病毒、带状疱疹病毒和流行性腮腺炎病毒)或免疫源性所引起的原发性炎性损害。 Facial palsy is a sudden loss of unilateral facial nerve function. Nearly 90% of cases have not yet found a clear cause, it is generally believed that facial paralysis is the facial nerve inflammation and located in the temporal bone or facial nerve canal that part of the apparent edema. The cause of edema is thought to be due to vascular ischemia in the bony facial nerve canal and / or to primary inflammation caused by viruses (including poliovirus, herpes zoster virus and mumps virus) or immunogenicity Sexual damage.