The common pathogenic bacteria for coughing up thick green sputum are, first, Pseudomonas aeruginosa; second, Staphylococcus aureus. The general sputum of P. aeruginosa is mainly yellow sputum, but when the concentration is high, the sputum can also be thick green sputum after concentration. Coughing green sputum is a lung infection, and lung infection is a large category of disease, provided that previous bronchial dilatation and lung disease are excluded. Sudden coughing of green sputum may be pneumonia. It is recommended to go to the hospital for sputum culture examination to clarify what pathogenic bacteria are causing it. Common pathogenic bacteria are Pseudomonas aeruginosa or Staphylococcus aureus, treatment mainly choose broad-spectrum antibiotics, can use piperacillin tazobactam intravenous use for 1 week, see if the amount of sputum has been reduced. So two aspects, first, hospitalization examination, do lung CT to exclude previous bronchial dilatation, pneumonia; second, sputum culture before, must be treated with antibiotics, can use broad-spectrum antibiotics, cephalosporin III or piperacillin tazobactam.