Abstract
Background: There have been many case reports previously stating Syndrome of Inappropriate Antidiuretic Hormone secretion (SIADH) as a manifestation of disseminated herpes zoster virus infection. Objective: The case report adds light to localised herpes zoster as a rare cause of SIADH, an often-under-diagnosed entity.Methodology: We report a 70-year-old female who was found in a state of altered sensorium after a presentation of itching and skin lesions over the left thoracic T (T7) region.Results: Laboratory investigations revealed euvolemic hyponatremia and the patient was diagnosed to have SIADH. Treatment was given for the aetiology of SIADH and to treat the euvolemic hyponatremia.Conclusion: Treatment of SIADH caused by localised herpes zoster shows quick recovery with the resolution of the herpetic lesions.
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