There are many reasons for coughing up white sputum, which is commonly found in chronic obstructive pulmonary disease, bronchitis and tuberculosis. 1. Chronic Obstructive Pulmonary Disease (COPD): Patients with chronic obstructive pulmonary disease (COPD) will have chronic coughing and sputum, and the sputum is white during the stabilization period, which is mainly due to the stimulation of soot and dust, and bronchodilators should be used, such as salbutamol and ipratropium bromide. 2. Bronchitis: If the patient has the phenomenon of coughing up white sputum for a long time, it belongs to the phenomenon of chronic bronchitis, which is mainly related to air pollution and smoking. You can use drugs to dissolve phlegm, such as aminobromine hydrochloride, carbocysteine and so on, together with antibiotic treatment, such as levofloxacin, moxifloxacin and so on. 3. Tuberculosis: Tuberculosis infection can also cause the phenomenon of coughing up white sputum, which is caused by tuberculosis mycobacterium infection, you can use isoniazid, rifampicin, levofloxacin and other drugs to take treatment. There are many reasons for coughing up white sputum, it is recommended to go to the hospital in time, improve the examination, clarify the cause of the disease, and carry out standardized treatment under the guidance of the doctor. The above drugs should be used under the guidance of the doctor.