Posted in Web Herpes Zoster and Postherpetic Neuralgia: Prevention and … January 26, 2021 Postherpetic neuralgia is the most common complication, occurring in about one in five patients. It is defined as pain in a dermatomal distribution sustained for at least 90 days after acute herpes… https://www.aafp.org/afp/2017/1115/p656.html