In clinical practice, nebulized inhalation can play a therapeutic role in the inflammatory response of the respiratory system, such as anti-inflammatory, anti-cough and asthma, phlegm, etc. The ratio of nebulized solution is selected according to the cause of the disease and the age, maintaining a nebulized can reach about 5-10 minutes, and the total amount of nebulized liquid can reach more than 4ml. Give 2 ml of saline and add nebulized solution, such as budesonide nebulized solution 1 ml, and also add chymotrypsin 4000 units. For symptoms of wheezing and shortness of breath bronchodilators can be given, for example, saline 2ml can be added to salbutamol nebulizer solution 1ml, terbutaline nebulizer solution 5ml, ipratropium bromide nebulizer solution 2ml. for patients weighing less than 20kg, as well as children, infants and young children population, the dose ratios of all nebulized drugs should be halved, or even need to be reduced again for nebulized treatment, as appropriate.