Early symptoms of central type lung cancer patients include: 1. cough: symptoms occur earlier and can be non-sputum, irritating cough; 2. blood in sputum: because the tumor is located in bronchus, it can invade bronchial artery, resulting in blood in sputum; 3. fever and pain: including bone and joint pain. Patients with central lung cancer who are found to have the above early symptoms should go to large medical institutions for consultation, examination and treatment as soon as possible, so as to strive for suitable surgery opportunities and avoid blind and excessive examination, diagnosis and treatment.