From the point of view of Chinese medicine, green phlegm is caused by wind-heat, which can be accompanied by coughing, coughing up pusy green phlegm, as well as sneezing, runny nose, while the snot is green pusy nasal mucus. The body is dry and hot, high fever, thirst, this time to clear heat and detoxification treatment. And most of the wind-cold is the invasion of the body by cold, coughing phlegm, white or clear phlegm, easy to cough up, nasal congestion, runny nose, clear nasal mucus, fear of cold, cold, no sweat, usually fever is low fever. So green phlegm belongs to wind-heat.