Yellow nose is common in the following cases: Firstly, chronic and acute rhinitis, when rhinitis occurs, yellow nose and pus nose will appear, because the infection of bacteria will appear after the infection of septic bacteria, septic bacteria infection will appear in the nasal cavity with the oscillation of nasal hair, the process of generating and discharging yellow nose. Secondly, for the wind-heat type of cold, there will also be yellow nasal discharge and pus nasal discharge. In the case of wind-heat type cold, the clinical symptoms of runny nose and yellow nasal mucus will also appear because of the wind and heat evils in the body. Thirdly, from the perspective of Western medicine, the clinical symptoms of yellow runny nose may also appear in bacterial colds.