 Herpes zoster and post herpetic pain are common causes of morbidity in the elderly. Herpes zoster is caused by reactivation of the virus varicella zoster of latent infection in sensory ganglia. The acute phase of herpes zoster usually occurs 30 days after rash onset. However, the most common complication of herpes zoster is the post herpetic pain, which is usually defined as a persistent chronic pain for 3 months after rash onset. The risk of herpes zoster in life is 25-30, but this figure rises to 50 among those aged 85 years. Similarly, the risk of experiencing post herpetic pain increases with age. 