This example of hives (urticaria), an itchy rash associated with allergic reactions, was caused by contact with a caterpillar -- or so the patient said.
You don't have to touch something to develop hives. For instance, allergic reactions to food can result in hives. People prone to anaphylaxis -- severe allergies to things like bee stings and certain foods -- should take any itchy rash seriously. Any person who develops hives and is having trouble swallowing or breathing needs to call 911 immediately.
Any opinions expressed here are for educational purposes only and are not intended for diagnosis.
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