Ans: D. 4 weeks(Ref Fitzpatrick 6/e p2302, 7/e p490-493, 1873-1898; Rooks 8/e p33.14-33.22; Roxburgh 18/e p52-54).Post-herpetic neuralgia (PHN):Most common & impoant neurologic complications of herpes zoster.Defined as pain after the rash has healed or pain 1 month or 3 months after rash onset.Best answer would be 4 weeks.
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