Nasal mucus that is green in color may be caused by Pseudomonas aeruginosa infection, which can be seen in acute rhinitis or sinusitis, among others. Pseudomonas aeruginosa is an opportunistic pathogen as well as a common nosocomial infection. It can be caused by prolonged use of a ventilator, poor environmental hygiene or low immunity. When Pseudomonas aeruginosa invades the nasal cavity or upper respiratory tract, it can stimulate localized inflammation, and the inflammatory secretions containing water-soluble chlorophyll produced by Pseudomonas aeruginosa appear green. Nasal mucus is green may also and stinky nose bacillus infection related, it is recommended to otorhinolaryngology consultation to clarify the diagnosis, follow the doctor’s advice to adopt suitable treatment program, so as not to delay the condition. Usually to ensure enough sleep, do not stay up late, pay attention to warmth, avoid body cold, but also pay attention to diet and nutritional balance, enhance resistance, reduce the probability of opportunistic infections.