Cough is one of the most common symptoms of respiratory diseases in children, and there are children with coughs in pediatric clinics every day. Some children have repeated coughs and take anti-inflammatory drugs and various cough medicines that do not work well, so beware that your child has an allergic cough. Allergic cough, also known as cough variant asthma, is often worse at night or in the early morning, with an irritating cough, or accompanied by sneezing, runny nose, itchy nose, itchy eyes and other symptoms of allergic rhinitis, conjunctivitis, or eczema. The cough is obvious during the change of seasons and sudden changes in temperature, and recurring episodes are difficult to cure as the climate changes, the environment changes, and lifestyle changes. This means that the child is allergic. There is evidence of allergy supported by such things as elevated eosinophils and elevated IgE in the blood; antibiotic treatment is ineffective, while application of glucocorticoids, anti-allergy medications, and beta2 agonists provide relief. Allergic cough can recur. First of all, avoid contact with allergens, foods that cause allergic symptoms, such as seafood, cold drinks and spices, do not keep pets and flowers at home, do not lay carpets, etc. Do not let your child sleep with a long fluffy toy, and dry the bed frequently. Adhere to a systematic and standardized course of treatment, apply inhaled glucocorticoids, leukotriene receptor antagonists, antihistamines, etc., and follow up regularly.