Nebulization treatment can play a role in resolving sputum and relieving cough, because the drugs commonly used in nebulization are acetylcysteine, budesonide, salbutamol and ipratropium bromide. Among them, nebulized acetylcysteine can play the role of diluting sputum and promoting sputum discharge; nebulized budesonide can play the role of eliminating inflammation in the airway and reducing secretions in the airway; nebulized salbutamol or ipratropium bromide can alleviate hyperreactivity in the airway and airway spasm, thus playing a role in relieving cough. When nebulizing, attention should be paid to the use of specialized nebulized dosage forms of drugs, and injectable drugs should not be used for nebulization, because injectable drugs contain preservatives, which can cause drug deposition or damage to the throat, bronchi, and alveoli if nebulized.