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A member asked:
How fast can hives spread?
3 doctors weighed in across 2 answers
Very rapidlly: Some allergic reactions are more aggressive than others and spread rapidly. In this case the patient needs emergency medical evaluation.
Answered 11/21/2016
6.3k views
Within minutes: People can develop head to toe hives within minutes of, for example, eating a food to which they are allergic. Hives are not contagious so do not spread from person to person. Individual hives only last from 1-24 hours but new crops can replace them. Consult an allergist to help determine cause and best treatment.
Answered 11/26/2012
5.5k views
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