Coughing with phlegm every morning is often the result of a respiratory infection. When an infection occurs, the mucous membrane of the respiratory tract secretes a large amount of inflammatory exudate, which induces neutrophils, eosinophils, basophils or phagocytes in the body to engulf foreign viruses or bacteria. As these cells shed and become necrotic, they mix with the inflammatory exudate to form sputum. At night, inflammatory exudate tends to accumulate in the bronchi, trachea, or alveoli. In the morning, it tends to irritate the mucous membrane of the respiratory tract and thus coughing occurs, and the sputum is discharged, so there is a cough with sputum every morning. It is often necessary to choose the appropriate medication according to the type of infection of the sputum. If it is white thin sputum, you can use oral solution of Chinese medicine to clear heat and detoxify the toxin; if it is yellow pus sputum, you need to use antibiotics to treat it, such as penicillin type and cephalosporin type, which are more effective.