Have you noticed any of the following manifestations in your child? Skin manifestations: eczema, acne, atopic dermatitis, red peeling rash around the lips or eyelids, rubella ……. Gastrointestinal symptoms: frequent vomiting, diarrhea, constipation, milk overflow, bloody stools, iron deficiency anemia ……. Li Ling, Children’s Health Center, Jinan Children’s Hospital Respiratory tract: runny nose, chronic cough, shortness of breath …… General symptoms: persistent crying, irritability …… Have you ever heard of food allergies? Food allergies are abnormal or overly strong immune responses caused by having specific food proteins for a group of diseases with symptoms involving the skin, respiratory system, digestive system, and cardiovascular system. What are the common allergens? During infancy and childhood, 90% of food allergies are related to 8 types of foods such as milk, eggs, peanuts, fish, shrimp, soybeans, wheat and nuts. Why are children more prone to food allergies than adults? This is because the child in the postnatal January gastric acid secretion is less, two years old within the intestinal protein hydrolase activity has not reached the adult level, when the food antigen into the body and the intestinal mucosal epithelial cells combined into the body, under normal circumstances, most of the pediatric intestinal tract of the food antigen to produce a tolerance reaction, but a few infants with a genetic predisposition to food antigens are susceptible to inducing a variety of abnormal reactions. Why is treatment necessary when the baby grows up, develops tolerance to the previously allergic food, and the symptoms disappear? Food allergy is often the first step in the allergic process, i.e. it may be the most common cause of a series of allergic diseases (asthma, allergic rhinitis) in later stages. Therefore, timely detection of allergic foods can stop the development of allergic diseases and reduce the incidence of allergic diseases by avoiding allergic foods. In the process of avoiding allergic foods, the doctor and dietitian should work together to monitor the physical and nutritional status of the child and to develop an optimal dietary program for the child.