Coughs can be caused by a variety of reasons and need to be treated for the cause. If the cough is caused by asthma, the symptoms can be relieved by nebulizing glucocorticoids or β₂ agonists. If the cough is caused by pathogenic infections with excessive sputum, nebulized acetylcysteine and other expectorants can be used to improve cough symptoms. If it is caused by other diseases such as gastroesophageal reflux disease (GERD), nebulization is ineffective and the cause needs to be treated. 1. Cough caused by pathogenic bacterial infection: For cough caused by pathogenic bacterial infection, if it is a bacterial infection, the first step is to use appropriate antibiotics such as amoxicillin for anti-infection treatment. If there are symptoms such as cough and phlegm, you can use aminoglutethimide and other cough suppressants to resolve phlegm, and if necessary, you can use acetylcysteine and other nebulized expectorant. 2. Asthma-induced cough: Asthma-induced cough can be treated with nebulizer such as budesonide and salbutamol to improve the symptoms. Asthma patients can also use inhalers such as budesonide powder inhaler. 3. Other diseases: For example, gastroesophageal reflux disease (GERD) is treated with proton pump inhibitors such as omeprazole and gastric stimulants such as mosapride; cough caused by postnasal drip syndrome requires active treatment of nasal diseases. Cough can be caused by a variety of diseases, if the symptoms continue to be unrelieved, it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease, and for the cause of the treatment, to avoid delay in the condition.