Localized chronic urticaria at the site of healed herpes zoster.

Sir, Isotopic response is de¢ned as the occurrence of a new, unrelated disease at the same site as a previous disease, commonly herpes zoster. Various diseases have been reported in terms of isotopic response associated with herpes zoster, but the development of localized chronic urticaria is very uncommon. Herein, we described a rare case of localized chronic urticaria presenting as pruritic multiple erythematous weals at the site of healed herpes zoster.