There are many causes of cough, such as cough caused by chronic airway diseases, respiratory infectious diseases and other respiratory diseases, nebulization can relieve cough symptoms. If the cough is caused by other diseases including gastroesophageal reflux disease (GERD) and respiratory tract obstruction, nebulization has no effect. 1. Chronic airway diseases: chronic airway diseases such as chronic obstructive pulmonary disease, bronchial asthma caused by cough, nebulization drugs can choose glucocorticosteroids such as budesonide, dilate the airway such as terbutaline, phlegm medicines such as acetylcysteine can be effective in relieving coughing, coughing up phlegm symptoms. 2. Respiratory tract infectious diseases: such as infectious pneumonia, nebulization can reduce respiratory mucosal congestion, edema, dilate the airway, phlegm, can effectively improve the symptoms of cough, cough. 3. Other diseases: such as cough caused by respiratory obstruction, gastroesophageal reflux disease, post-nasal drip syndrome and other diseases, nebulization is generally ineffective, and need to actively treat the primary disease, in order to effectively alleviate cough symptoms. Repeated cough patients are recommended to actively seek medical attention to clarify the cause of the disease, in accordance with the doctor’s instructions for reasonable treatment.