The following diseases can cause yellow sputum in the throat in the morning: 1, bronchiectasis, the main clinical manifestations of recurrent cough, cough yellow sputum, through the lung CT can be a clear diagnosis, the clinic should actively carry out anti-infection, expectorant and other comprehensive treatment. 2, the acute stage of chronic obstructive pulmonary disease can also appear cough yellow sputum, usually combined with bacterial infections, the sputum culture can be perfected to detect, according to the sputum culture, the results of the allergy to use antibiotics. 3, patients with lung abscess can also appear cough yellow sputum, generally combined with bacterial infections, can improve sputum culture, the results of antibiotics can be used. Antibiotics can be used according to the results of sputum culture and drug sensitivity. 3, patients with lung abscess can also cough up yellow sputum in the morning, and can improve the examination of lung CT. Clinical need to use anti-anaerobic antibiotics, such as penicillin, ornidazole, metronidazole, etc., at the same time improve the sputum culture examination, change the antibiotics, at the same time to pay attention to sputum drainage, the use of expectorant drugs and postural drainage.