Allergy is not the main trigger of urticaria in children referred to the emergency room.

BACKGROUND: Urticaria is the disease that has the highest impact on quality of life and requires the most visits to the emergency room. OBJECTIVE: To investigate the clinical presentation of acute urticaria in children referred to the paediatric emergency room of our hospital and to define possible related aetiologies. METHODS: We included 814 children consecutively referred to the emergency room between January 2006 and December 2007 with a diagnosis of acute urticaria, isolated or associated with other clinical symptoms. RESULTS: Only 2.0% of the cases studied were associated with severe clinical pictures. In 437 cases (53.7%), the cause of urticaria was not determined. The infections of the respiratory tract were the most frequently suspected aetiological factor. The diagnosis of allergic urticaria is more defined, but belongs to a minority group (10.8%). The first level treatment includes the use of non-sedating oral H1-antihistamine. CONCLUSION: The children with urticaria are frequently referred to the paediatric emergency room, but only in a few cases were associated with severe clinical manifestations or allergy. The evidence of an inverse relationship between the number of accesses and the patients' age may be explained by the higher prevalence of this disease in early childhood and possibly also by a higher concern of the parents of the younger patients.