What are the common early symptoms of lung cancer? 1.Cough: mostly paroxysmal, irritating dry cough. 2.Hemoptysis: mostly with blood in sputum or blood sputum. 3. Chest and back pain and chest tightness. What are the common examination methods to diagnose lung cancer? 1.Chest X-ray examination. 2.CT examination, which is more accurate. 3.Sputum cancer cell examination. 4.Fiber bronchoscopy. 5.PET-CT. 6.Lung puncture or thoracoscopic biopsy. What should be noted in the diet of lung cancer patients? 1. High fat, moldy things, cured ham and smoked food, pesticide contaminated food containing carcinogenic substances should be avoided. 2.It is appropriate to eat “three high and one low” diet with high protein, high vitamin, high calorie and low fat, especially to eat more fresh vegetables and fruits. What are the common methods of lung cancer treatment? Lung cancer treatment is a multidisciplinary and comprehensive treatment mainly based on surgery, and the commonly used methods include surgery, radiotherapy, chemotherapy, traditional Chinese medicine, immunotherapy, gene therapy, etc., among which surgery is the most important treatment method. V. How to prepare and cooperate before lung cancer surgery 1. Quit smoking and alcohol. 2.Lung function exercise and effective cough and sputum training.