Symptoms and manifestations of pneumonic lung cancer mainly include cough, sputum, hemoptysis with chest tightness, chest pain and fever. Pneumonic lung cancer is a type of lung cancer named according to the imaging examination. The cause of lung cancer is inflammation and infection of lung, which is manifested as a large fuzzy shadow on CT, and the patient mainly manifests coughing, coughing sputum, hemoptysis and accompanied by symptoms of chest tightness, chest pain, and fever, which is easily misdiagnosed as pneumonia due to the similarity of clinical symptoms with those of pneumonia. Patients should quit smoking, avoid going to polluted places, wear masks when going out, eat a balanced diet, don’t eat spicy and greasy food, eat more fresh vegetables and fruits, and exercise appropriately.