Cough is the most common clinical symptom, mostly seen in respiratory diseases. cough with yellow sputum mostly indicates the presence of infection, which is a kind of infectious cough, mainly due to the following reasons: 1. common cold, the symptoms of coughing yellow sputum during the acute period of common cold, and mostly accompanied by nasal congestion, runny nose, sore throat, etc. 2. acute laryngitis, bacteria multiplying in the throat, causing increased secretion of glands in the throat, and the symptoms of coughing yellow sputum. 3. The symptoms of coughing yellow sputum are also accompanied by sore throat. 3. acute tracheobronchitis with coughing and sputum as the main manifestation, coughing yellow sputum when bacterial infection occurs. 4. pneumonia, mostly caused by Gram-positive bacteria infection, accompanied by fever symptoms. 5. bronchiectasis, bronchiectasis combined with infection can appear coughing large amounts of yellow sputum. 6. lung abscess, lung abscess of Staphylococcus aureus infection coughing yellow sputum. Coughing yellow sputum should be treated according to the specific reasons for choosing the appropriate medication. Coughing up yellow sputum lumps is commonly caused by purulent bacterial infection in the body, causing congestion and edema of the respiratory mucosa and the exudation of a large amount of yellow purulent secretions. More common are acute bronchitis, bronchopneumonia, lung abscess and various causes of bronchiectasis, idiopathic interstitial lung fibrosis, bronchial asthma, etc., combined with bacterial infections. If necessary, yellow sputum can be taken for pathogen culture and drug sensitivity test to clarify the cause of the disease and provide symptomatic and etiologic treatment, including antibiotics such as ceftazidime and ciprofloxacin.