Bronchiectasis without coughing up blood, coughing up yellow sputum suggests that there may be an acute infection, which requires blood tests and other tests to assist in the diagnosis. In acute infections, yellow sputum and pus sputum appear as bacteria multiply in the dilated bronchial tubes and stimulate the production of airway secretions, as well as abnormally high levels of leukocytes and calcitoninogen in laboratory tests. Treatment consists of coughing up the sputum and administering oral or intravenous antibiotics. Intermittent coughing to expel sputum, oral antibiotics such as cefixime, amoxicillin, etc., and intravenous antibiotics such as levofloxacin, cefodizime, etc., may be used when the effect is unsatisfactory. Bronchiectasis without coughing up blood, coughing up yellow sputum need to further improve the examination to clarify the cause, it is recommended to timely visit the hospital, under the guidance of the doctor for standardized treatment, the above drugs can not be taken on their own.