Bronchitis cough with white sputum for twenty days, need to be based on whether the combination of pneumonia to decide the next step in the treatment. 1. Bronchitis twenty days, a long time, it is recommended that the hospital, ① perfect chest imaging CT or X-ray, to rule out pneumonia or other lung diseases. ② blood related laboratory tests, such as improving blood CRP, Mycoplasma pneumoniae antibody, Chlamydia pneumoniae antibody and other tests, to clarify whether the combination of related pathogenic bacteria infection. 2. According to the results of the examination, decide the next treatment plan. If the diagnosis of bronchitis is made without pathogenic bacteria infection, give cough suppressing and resolving phlegm medicines, such as aminoglutethimide syrup, acetylcysteine tablets, etc. If the combination of pathogenic bacteria infection, give cough suppressing and resolving phlegm medicines. If combined with pathogenic bacterial infection, give antibiotics orally, such as cephalosporins, penicillins, and so on. If the diagnosis is pneumonia, it is recommended to hospitalize and give infusion treatment. Because of the long duration of the cough, must hospitalization, clear diagnosis, to avoid delaying the condition, leading to more serious complications, jeopardizing our health.