Hives: They can last18-24 hours, but new outcroppings can continue indefinitely.
Answered 4/10/2013
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Allergic reactions may last for weeks, and chronic hives requires further evaluation. Typically immediate hives reactions are controllable and please discuss the use of a children' s antihistamine with your PCP. Recognize the spectrum of reactions which are more severe and include vomiting, respiratory difficulty and drooling. Emergency room management is then indicated. Avoid any known allergens
Answered 4/11/2021
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