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A member asked:

Do hives show up immediately after an exposure to an allergen?

A doctor has provided 1 answer

Often with 2 hours : Hives or urticaria caused by exposure to allergens (such as food) typically occur rapidly, often minutes but can occur up to 2 hours later. It is important to know that not all hives are due to allergy.

Answered 9/6/2013

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