Recognize that delayed hypersensitivity reactions to sulfonamides may present as urticated plaques with hyperpigmentation and purpura for which a diagnosis of urticarial vasculitis should be considered.
Keywords: Urticaria; drug exposure; hives; hyperpigmentation; leukocytoclastic; vasculitis.
© 2021 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.