Postherpetic Neuralgia (PHN) is one of the most common complications of herpes zoster infection in elderly persons ages 60 years and older, worldwide. The main symptom of PHN is severe pain and allodynia (pain that results from a non-injurious stimulus to the skin). PHN is associated with a significant loss of activity levels and a reduced quality of life, particularly in the elderly. The strongest established risk factor for PHN is advancing age. Other possible risk factors for PHN include severity of acute herpes zoster pain, extent of rash, and duration of prodromal pain. The number of incident cases of …
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