Baby allergies are mainly manifested in the skin, respiratory tract, gastrointestinal tract and other symptoms. 1. Skin: such as redness of the skin, hives, etc., manifested as itching, and in the case of food allergies, redness and swelling around the mouth, or even blisters. 2. Respiratory tract: such as sneezing, coughing and other symptoms, similar to the symptoms of colds, but usually not accompanied by fever, and in severe cases may cause bronchial asthma, dyspnea, wheezing and other symptoms. 3. gastrointestinal: such as nausea and vomiting, loss of appetite, diarrhea and other symptoms, may appear abdominal pain symptoms, causing the baby to cry, irritable. When your baby has allergic symptoms, you need to go to the hospital for allergen testing in time to avoid contact with allergic substances.