Allergies in babies, usually caused by genetic factors, environmental factors and low immunity, can manifest as allergies to the skin, respiratory tract and tissues of the digestive tract. Prompt screening for allergens and treatment under the guidance of a medical professional is required. Babies who are prone to widespread allergic reactions and allergic diseases from common causes have an allergic constitution. Babies who occasionally react to a known factor are not in this category. That is, babies are more likely to develop an immune response than others. Some researchers believe that the difficulty of exposing babies to various types of microorganisms may also contribute to the development of allergies. Common symptoms 1, skin allergy: commonly seen in eczema, urticaria, dermatitis, wind clumps and other various rash manifestations; 2, respiratory allergy: such as allergic rhinitis, bronchial asthma and allergic cough, but also asthma, adenoid hypertrophy and other symptoms; 3, gastrointestinal allergy: generally less common, mainly manifested as diarrhea, vomiting, bloating and other adverse digestive system symptoms, can overlap with enteritis and other digestive system diseases. Differential diagnosis is needed. Treatment 1, medication: allergic babies are prone to acute allergic attacks, at this time can be used under the guidance of professional doctors loratadine, montelukast sodium to relieve allergy symptoms; 2, daily care: more baby activities, appropriate physical exercise, such as swimming, to enhance physical fitness. Pay attention to the protection of the skin, timely cleaning, to avoid skin infections. In the season of pollen prevalence, or haze, dusty weather for outdoor activities, you need to bring a good mask to reduce the chances of respiratory allergy. Precautions are recommended to avoid intake of allergenic substances after screening for allergens. Pay attention to a balanced diet, drink more water and eat more fresh fruits and vegetables, such as cabbage and apples, for vitamin supplementation.