摘要Herpes zoster (HZ) is an acute virus infectious disease mainly affecting middle-aged and elderly people.The morbidity rates of HZ in the age group of 50-59 years and 60-69 years are, respectively, 46 and 69 (per year, per 10,000 people).The age groups of 70-79 years and 80-89 years have a much higher rate of 95 and 109 (per year, per 10,000 people), respectively,[1,2] Postherpetic Neuralgia (PHN) is a neuropathic syndrome which manifests as ongoing pain along the cutaneous nerve/s located in the area of prior HZ rash and typically involves one or more of the following types of pain: spontaneous aching or burning;paroxysmal shooting;and allodynia and hyperalgesia.While in the majority of cases, this pain will resolve within a year of initial rash presentation, for some patients the pain may persistfor 5 years or more.