Allergic cough is very common and treatment is mainly directed at allergen avoidance, anti-allergy treatment and symptomatic treatment. Since the name is allergic cough, the cause is generally allergies. Therefore, the first step is to find the allergen. In general, the likelihood of a rapid onset of the disease is high, so it is useful to review what your child has been exposed to in the past 24 hours, or even to summarize what he or she has been exposed to in the past when the cough suddenly increased. Respiratory allergies are relatively common and include house dust, dust mites, pollen, mold, etc. If the allergen cannot be found and you are continuously in an allergic environment, all other treatments are only temporarily effective. Anti-allergic drugs, such as inhaled glucocorticoids and oral cetirizine, can be applied to help reduce the child’s allergic state. Of course, symptomatic treatment is also needed. Allergies can cause swelling of the airways, a small amount of thick secretions, and even co-infection. At this time, it is necessary to add drugs to dilute sputum, dilate bronchial tubes, or anti-infective drugs to promote the recovery of the disease, but of course, it is not reasonable to blindly apply antibiotics. From the perspective of internal factors, it is advocated to strengthen the patient’s own constitution, to let the patient exercise more and to have a balanced diet. In conclusion, looking for patterns in the child’s living environment and the triggers at each attack is probably the most important way to discover allergens and improve allergic cough from the root.