Coughing up yellow sputum can be seen in wind-heat cold, wind-cold cold cough white sputum, but wind-cold for a long time, can be depressed and transformed into heat (the evil qi too long stay will be transformed into heat), can also be seen coughing up yellow sputum! Wind-heat colds are mainly characterized by chills (fear of cold), fever, fever and chills, nasal congestion, cough and phlegm, yellow phlegm, sore throat, dry mouth, and so on. The treatment can use Yin Qiao San plus reduction. Wind-cold cold mainly manifests as chills and fever, chills and fever, nasal congestion, cough and sputum, sputum white and thin, no pain in the throat, pale red tongue, thin white moss, floating tight pulse. For treatment, use Thorny Prevention and Expression Soup. If coughing up yellow phlegm, consult the clinician and follow the doctor’s instructions.