Abstract
Cholinergic urticaria is commonly encountered in allergy practice. Its signature pattern of pruritic, pinpoint wheals and surrounding erythema, triggered by heat and exercise, make it one of the most recognizable of the chronic inducible urticarias. However, things aren’t always what they seem. Asking one question, in particular, could suggest a more ominous condition with significant treatment implications – “Do you sweat?”
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