Obtain as detailed a history as possible. Useful information regarding the reaction includes what the symptoms were, how long after eating the symptoms appeared, how long the symptoms lasted and whether or not any treatment was used to alleviate the symptoms. Useful information regarding the food includes what the food was, how much was eaten, whether or not the child has eaten the food previously and whether or not the food has been eaten since the episode. In general, we advise against sending food-specific IgE levels (especially panel testing) because false positives and/or clinically irrelevant results are common and can lead to inappropriate avoidance of foods and misuse of health care resources.
Initial management should include patient education regarding avoidance of the culprit food. If there is concern for IgE-mediated allergy, then prescribing an epinephrine autoinjector and educating the family on its proper use would be recommended.