Gastrointestinal food allergies are common in infants and children. Tell the interviewer about symptoms such as vomiting, reflux, abdominal pains, diarrhea, and constipation that you look for in your patients. The interviewer wants to hear how you handle your food allergy and sensitive patients. Describe how you instruct patients to keep a journal of the foods they eat and how and when they are instructed to slowly bring them back into their diet in order to identify the allergy.