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A member asked:

How long does it take for an allergic reaction to show up on your skin?

A doctor has provided 1 answer
Dr. Michael Zacharisen answered

Specializes in Allergy and Immunology

Depends: Hives or urticaria can occur within minutes on skin contact or ingestion of a food allergen, while contact dermatitis from poison ivy or nickel may take 48 hours.

Answered 8/17/2018

5.3k views

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