If there is sputum in the bronchus, the sputum can be diluted by atomization treatment to make the sputum coughed up as much as possible. Also, the sputum can be diluted by drinking more warm boiled water to make it easy to discharge the sputum. In addition, patients can also take oral expectorant drugs, such as ambroxol, which can make sputum easier to discharge. If there is bacterial infection, anti infection treatment should be given actively. For example, cephalosporins or penicillin antibiotics can be taken orally to significantly improve the symptoms of sputum in the trachea.