3 doctors weighed in:
How fast can hives spread?
3 doctors weighed in

Dr. Eugene Saltzberg
Emergency Medicine
1 doctor agrees
In brief: Very rapidlly
Some allergic reactions are more aggressive than others and spread rapidly.
In this case the patient needs emergency medical evaluation.

In brief: Very rapidlly
Some allergic reactions are more aggressive than others and spread rapidly.
In this case the patient needs emergency medical evaluation.
Dr. Eugene Saltzberg
Dr. Eugene Saltzberg
Thank
Dr. Martin Ostro
Internal Medicine - Allergy & Immunology
In brief: 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.

In brief: 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.
Dr. Martin Ostro
Dr. Martin Ostro
Thank
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Dr. Christopher Crosby
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