When you have bronchitis, you will mainly have cough, phlegm, chest tightness, shortness of breath and wheezing, and you can’t get air mainly because of airway spasm, which is caused by both the obstruction of phlegm and the airway itself, so first of all, you should treat the cause of the disease. First, if the virus or bacterial infection, first of all, antiviral or antibacterial choice of drug treatment. Secondly, in the case of more sputum, effective phlegmolytic drugs must be chosen, and if it is obvious to hold asthma, bronchial relievers should be added, commonly beta agonists, such as salbutamol, and also oral asthma medications.