Green and sticky nasal mucus may be a characteristic symptom of Pseudomonas aeruginosa infection, or it may be due to the fact that the mucus looks green to the naked eye. Pseudomonas aeruginosa infection can be caused by a variety of reasons, including upper respiratory tract infections, bronchitis, pneumonia, and prolonged use of a ventilator. As the patient is infected by Pseudomonas aeruginosa, the respiratory mucous membrane secretion increases, and the inflammatory secretion contains a large number of Pseudomonas aeruginosa, which leads to the green color of nasal discharge. It may also be due to acute upper respiratory tract infection, resulting in yellow nasal discharge and nasal discharge looks like green to the naked eye after concentration, not Pseudomonas aeruginosa infection, but also a type of bacterial infection, it is best to actively treat. Nasal discharge is green and sticky patients need timely examination, do not delay the disease, to prevent sinusitis. Patients should pay attention to the adverse effects of the drug, precautions and contraindications.