Cough with phlegm is caused by the invasion of viruses and bacteria, resulting in upper respiratory tract infection and the resulting secretions, which are discharged by coughing to ensure the cleanliness and smoothness of the respiratory tract. There are several causes of cough with phlegm: i. Cough with phlegm due to lung heat, which is caused by the wind evil offending the lungs or wind-cold turning into heat, and the lungs being injured by heat toxins and losing the ability to declutter and clear the lungs. Second, bronchopneumonia cough with phlegm, bronchitis is usually a viral infection caused by the common cold, influenza, or may be due to bacterial infection, and is a common acute upper respiratory tract infection in life. Third, dry lung cough with phlegm is a cough caused by dryness that injures the lungs. In the treatment, we should choose anti-inflammatory and phlegm removal, and then focus on cough relief, and it is best to choose a proprietary Chinese medicine with three effects: anti-inflammatory, phlegm removal and cough relief, which can be used as acute syrup.