Herpes zoster is a common skin disease caused by varicella-zoster virus infection. In clinical treatment, antiviral therapy is the first choice of treatment measures, commonly used drugs is acyclovir. Acyclovir is generally recommended for oral treatment in the clinic, and patients are advised to take 0.8g orally five times a day. Patients in the oral at the same time, pay attention to a lot of water, to avoid the occurrence of renal impairment, Acyclovir patients are applied to 7-10 days for a course of treatment. If the patient himself has autoimmune resistance is relatively poor, or patients with disseminated herpes zoster, you can choose to apply acyclovir intravenously.