One of the most important goals of pain medicine is to prevent acute pain from developing into chronic pain, and shingles is a case in point. We know that the difficulty in treating herpes zoster pain and postherpetic neuralgia is mainly related to its pathogenesis. First, the disease is caused by a virus that infects the nerve and continues to multiply, for which there are no effective antiviral drugs; second, the virus can cause permanent damage to the nerve fiber structure after invading the nerve. The residual neuralgia after healing from herpes is strongly related to the age of the patient, with 50% of patients over 60 years of age having residual neuralgia and 75% of patients over 70 years of age having residual neuralgia. Therefore, the incidence of post-herpetic neuralgia is very high in elderly patients, and this intractable pain can be effectively prevented by pain medicine treatments. There are still many people who think that pain medicine is only for chronic pain, so they rarely visit pain medicine during the acute phase, so most patients spend the acute phase of herpes zoster in dermatology, and as a result, they miss valuable time to prevent chronic pain.