1. Definition of children’s allergies Children’s allergies refer to children’s abnormal reactions to certain substances, usually manifesting as symptoms such as skin itching, difficulty breathing, and indigestion. Allergens can be food, pollen, pet hair, etc. Severe allergic reactions can even be life-threatening. 2. Symptoms of allergies in children 1. Skin symptoms: including skin redness, blistering, edema, etc. 2. Respiratory symptoms: including wheezing, shortness of breath, tight throat, etc. 3. Digestive symptoms: including diarrhea, nausea, vomiting, etc. 4. Systemic reactions: including dizziness, rapid heartbeat, etc. 3. Common allergens 1. Food contamination