Lung infection in postoperative lung cancer patients may cause cough, sputum, fever, poor appetite, chest tightness and other symptoms. As the immunity resistance of postoperative lung cancer patients is poor, they are prone to lung infection and inflammation due to various factors. At this time, the symptoms that often appear due to inflammation attack on the lungs are fever, nausea, chest tightness, cough and sputum, etc. Postoperative infection is a common postoperative complication of lung cancer, which can be dealt with in time. It should be noted that cough, chest tightness and other symptoms may be caused by surgery, anesthetics, intubation, cancer itself, etc. Therefore, patients with these symptoms need to undergo blood test, CT, X-ray and other tests to determine lung infection and take targeted medication, assist sputum expulsion, and increase enteral nutrition to avoid serious infection or even sepsis. It is recommended that lung cancer patients and their family members who have lung infection after surgery should consult Head and Neck Surgery Department and Department of Oncology for detailed precautions and actively cooperate with the treatment.