WebMD Answers
Certain food allergies like nuts and seafood are less likely to be outgrown, but most others resolve over time. Food allergy causes a specific type of reaction such as immediate (within minutes to a few hours) hives, lip/tongue swelling, flushing, itching, lightheadedness, nausea, vomiting or low blood pressure every time the offending food is consumed. Pustules (acne-like lesions) are usually non-allergic.
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