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. 3. Acute tracheobronchitis with cough and sputum as the main manifestation, coughing yellow sputum when bacterial infection occurs. 4. Pneumonia, mostly caused by Gram-positive bacterial infection, accompanied by fever symptoms. 5. Bronchiectasis, bronchiectasis combined with infection can appear coughing large amounts of yellow sputum. 6. Lung abscess, Staphylococcus aureus infection of lung abscess coughing yellow sputum, coughing with Yellow sputum should be treated by choosing the appropriate medication according to the specific cause.