Food allergy
January 30, 2026
An unpleasant or dangerous immune system reaction after a certain food is eaten.
Food allergy is an unpleasant or dangerous immune system reaction after a certain food is eaten.
Reactions can include digestive issues, hives or swollen airways. Serious reactions can be life-threatening.
Antihistamine medicines treat mild reactions. A serious reaction needs an injection of the drug epinephrine and emergency room care.
© 1998-2026 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.
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