Phlegm in the airways with rales, may be caused by bronchial asthma, acute exacerbation of chronic obstructive pulmonary disease, lung abscess, etc., usually take drugs for treatment. 1. Bronchial asthma: inhaled glucocorticosteroids, such as budesonide, can be used as prescribed by the doctor during the stabilization period, or its mixed preparation with long-acting β2 agonists, such as fluticasone salmeterol inhaler. Inhalation of short-acting β2 agonists such as salbutamol and terbutaline is preferred in acute exacerbations, and oral or intravenous glucocorticosteroids such as prednisone may be considered in severe cases. 2. Acute exacerbation of chronic obstructive pulmonary disease (COPD): low-flow oxygen inhalation can be carried out, and at the same time, oral aminobromisole hydrochloride tablets, budesonide formoterol inhalation powder aerosol can be taken as prescribed by the doctor. At the same time, the cause of acute exacerbation should be clearly defined, the most common is bacterial or viral infection, according to the clinical experience or drug sensitivity results to be anti-infective treatment, commonly used drugs, such as azithromycin, levofloxacin and so on. 3. Lung abscess: pay attention to good sputum drainage, at the same time according to the pathogen, follow the doctor’s prescription oral penicillin V potassium tablets, amoxicillin clavulanate potassium tablets and so on. Tracheal sputum with croup patients are advised to go to the hospital in time, clear cause of the standardized treatment in accordance with medical advice.