The appearance of cold, cough and yellow sputum indicates that the cold is caused by bacterial infection and requires the use of phlegm-relieving drugs, such as Lung Power Cough Compound, Oxalis serpentina Chuanbei Liquid, compound fresh bamboo liquid or fresh bamboo liquid, which are more effective in relieving cough and expectorant. Especially for cough with yellow phlegm, the effect will be better. Because of the occurrence of bacterial infection, it is necessary to use antibiotics for anti-inflammatory treatment. If the infection is confined to the upper respiratory tract and no bronchitis or pneumonia occurs, oral antibiotics are more effective. For example, penicillin can be given orally as amoxicillin or amoxicillin clavulanate potassium if there is no allergy. If allergies exist, cefixime or azithromycin can also be used for anti-inflammatory treatment. If the infection has spread to the lower respiratory tract, one should be hospitalized for intravenous drip medication, and intravenous drip antibiotics are also needed at this time.