Postherpetic neuralgia is a painful condition that affects your nerves and skin. It is a complication of herpes zoster, commonly called shingles. If the pain caused by shingles continues after the bout of shingles is over, it is known as post-herpetic neuralgia (PHN). It is estimated that about 1 in 5 patients with shingles will go on to have PHN.
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