The side effects of neonatal nebulizer inhalation are very mild and negligible, because the drugs used for neonatal nebulizer inhalation are mainly glucocorticoids and bronchodilators, which are relatively safe, and nebulizer inhalation is a direct local administration of drugs in the respiratory tract, which has a very mild effect on the whole body of the neonate. Nebulized inhalation can treat acute bronchitis, acute bronchopneumonia and capillary bronchitis in newborns, and the combination of these drugs can play a significant role in relieving cough and phlegm and calming asthma. However, if you do not pay attention to the cleaning of the mouth after nebulizing the newborn, especially for a long time, it can cause secondary fungal infections in the oropharynx, which is the most common side effect of nebulization in newborns, and can mostly be prevented by cleaning the mouth.