Herpes zoster is a viral disease characterized by unilateral radicular pain and vesicular eruptions that are generally limited to the dermatome innervated by single spinal or cranial sensory ganglion. The disease causes severe pain and in particular, put elderly patients in great risks and further it develops postherpetic nenralgia. Nowadays western medicine use antiviral durg(ex: acyclovir), analgesics, nerve block and etc for treatment of herpes zoster and pain control, but the effect is not much satisfactory. A 73-year-old patient, admitted to our hospital because of severe migrain. Two days later, her illness was diagnosed as herpes zoster so we administrated Yongdamsagan-tang. After the six-day of treatment, all symptoms improved, especially headache was cleared since the four day long administration of Yongdamsagan-tang.