If you have bronchitis and always have a dry cough, you should check for Mycoplasma pneumoniae. If you have mycoplasma infection, you are likely to have a dry cough, and you need intravenous macrolide antibiotics for anti-inflammatory treatment, which are more effective for mycoplasma infection, and you can get intravenous azithromycin or erythromycin. In addition, you can also use cough medicines, such as fenagan syrup for children, or in the case of adults, tranylcypromine hydrochloride, tranylcypromine oral solution or pulmonary cough combination, for cough expectorant treatment, which is more effective. If the effect is not obvious, nebulized inhalation medication is needed to relieve the symptoms of dry cough. It is recommended to use a nebulizer to nebulize terbutaline sulfate and budesonide to relieve the symptoms of dry cough. Terbutaline sulfate is a bronchodilator, which can effectively relax the bronchial tubes and relieve cough symptoms, and budesonide is a glucocorticoid, which can attenuate the inflammatory response.