Cough of lung cancer is mostly irritating dry cough with no or little sputum, which can be aggravated when the tumor causes sub-bronchial stenosis. Cough is mostly an early symptom of lung cancer, which is a common symptom of lung cancer. It is often manifested as irritating dry cough without sputum or little sputum, usually persistent, and the cough is mostly high-pitched metallic cough or irritating choking cough. Different types of lung cancer have different symptoms. For example, mucinous adenocarcinoma may have a large amount of mucous sputum. If this kind of lung cancer is secondary infection and is mucopurulent. If coughing with sputum and blood, it is mostly central type lung cancer, and if the tumor grows into the lumen, there may be blood in sputum, and if the surface erosion seriously violates the large blood vessels, there will be a large amount of hemoptysis. In addition to coughing symptoms, lung cancer may also have clinical manifestations such as shortness of breath, chest pain, hemoptysis and fever. If you suffer from lung cancer, you should consult the clinician for treatment as soon as possible.