What is the cause of spitting up yellow sputum with cold?

Yellow sputum is clinically common during cold. The cause of this disease is related to bronchitis caused by cold on the one hand, and wind-heat cold caused by fire on the other. It needs to be treated actively. Patients are advised to take Qing fever and detoxification granules, Ambroxol, Niuhuang detoxification tablets, Qing Huo tablets, Gardenia jinhua tablets, etc. for active treatment to control and relieve the condition of yellow sputum and gradually restore health. Spitting yellow phlegm is mostly seen in wind-heat lung evidence, and the main pathogenesis is wind-heat invading the lungs and the lungs are not cleared. Mulberry chrysanthemum drink can be consumed, which has the effect of clearing wind-heat and moistening the lung and relieving cough. The main clinical symptoms are severe cough, coarse breathing, hoarse cough, sore throat, sticky and yellow sputum, accompanied by nasal congestion, runny nose, thirst, headache, fever, etc., with thin yellow tongue coating and floating pulse count.