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Postherpetic neuralgia
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Postherpetic neuralgia

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Contributors: Andrea Wasilewski MD, Richard L. Barbano MD, PhD
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Synopsis

Herpes zoster infection can occur from reactivation of the herpes varicella-zoster virus or from primary infection. In two-thirds of adults, reactivation is characterized by severe pain and paresthesias in a dermatomal distribution, followed 1-2 weeks later by the appearance of a vesicular rash. The thoracic, cervical, and trigeminal dermatomes are most commonly involved. Approximately 25% of patients have residual neuropathic pain lasting greater than 4 months following resolution of the rash, a condition known as postherpetic neuralgia (PHN).

The risk of developing PHN increases with age. In patients with persistent pain following rash resolution, pain and temperature sensation are hyper-acute, leading to severe pain even with light touch (allodynia) or episodes of unpredictable shooting or stabbing pain. PHN is a clinical diagnosis. Neuralgiform symptoms can persist from weeks to a lifetime.

Codes

ICD10CM:
B02.29 – Other postherpetic nervous system involvement

SNOMEDCT:
2177002 – Postherpetic neuralgia

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Last Reviewed: 07/31/2018
Last Updated: 09/04/2018
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Postherpetic neuralgia
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Postherpetic neuralgia : Burning skin, Dermatomal, Sleep disturbance, Anorexia
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