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Normally food allergy symptoms appear within a few minutes of eating the offending food, although they may be delayed by up to a couple of hours. The symptoms are usually those of ‘classic’ allergy, some of which are listed below:

Gut reactions: Abdominal pain, vomiting, diarrhoea

Skin reactions: Itching and swelling (rash or nettle rash)

Respiratory reactions: Runny nose, sneezing, wheeze, cough