Cold and flu nasal discharge is yellowish green and relatively sticky. This clinical manifestation is mainly common due to induced factors such as cold, rain, alcoholism, staying up late, fatigue, etc., which reduce resistance and lead to the entry of Pseudomonas aeruginosa into the human body, congestion, edema and large amount of yellowish green sticky secretions exuding from the mucous membrane of the upper respiratory tract. These secretions contain live and dead P. aeruginosa and exfoliated tissue fragments, as well as a large number of metabolites of the inflammatory reaction. Anti-pseudomonas aeruginosa antibiotics, such as ciprofloxacin, ceftazidime, tobramycin, and polymyxin, can be used, and if necessary, more than two antibiotics can be used in combination for treatment.