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Year : 1990  |  Volume : 56  |  Issue : 2  |  Page : 109--111

Evaluation of the causes of physical urticarias

Correspondence Address:
Mohan Singh

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Source of Support: None, Conflict of Interest: None

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Five hundred patients with urticaria were evaluated for physical factors. While 415 (83%) patients associated one or more physical factors in their history, only 37% were found to be suffering- from physical urticaria following tests. These included symptomatic dermographism (16.38%), cholinergic urticaria (10.84%), cold urticaria (8.43%). solar urticaria (0.72%), pressure urticaria (0-48%) and delayed cold urticaria (0.48%). The study stresses the, importance of doing physical challenge tests in all patients since historical iuivicions were not always confirmed on subsequ6nt tests. Moreover, some patients of cold chofinergic urticaria were not aware of the precipitating factors and did not provide any clue in the history.

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Online since 15th March '04
Published by Wolters Kluwer - Medknow