Coughing with rales is mostly considered to be caused by airway spasm or obstruction, resulting in airway narrowing and thus rales will appear. In this case, it is recommended to stop the cough and resolve the phlegm at the same time, add asthma medication to dilate the airway, so that the bronchial spasm can be relieved, and if it is considered to be caused by obstruction, the cause should be actively identified. Bronchodilators can use β2 agonists such as salbutamol or anticholinergic drugs such as ipratropium bromide, and the croup will disappear soon after active asthma treatment, and oral cough and phlegm medication should also be taken.