Urticaria has been reported with viral, bacterial, and parasitic infectious diseases. Viral infections associated with acute urticaria include Epstein-Barr virus, hepatitis (A, B, and C), and herpes simplex virus. Streptococcal infection is a known cause of acute urticaria in children. Urticaria has also been associated with chronic parasitic infections. The specific etiology can be identified in only about 50% of patients, regardless of the extent of the laboratory testing or other investigations. Lesions caused by insect bites can last longer than 24 hours. Urticarial reactions to penicillin can occur up to 14 days after a course of treatment has stopped.
Learn more about etiology of urticaria.
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Cite this: William James. Fast Five Quiz: Urticaria (Hives) - Medscape - Dec 12, 2022.