Lung cancer cough may appear as coughing all the time, or coughing occasionally, and the two situations may also appear at the same time, so it is impossible to make a generalization. Lung cancer is a primary malignant tumor of lungs originated from bronchial mucosa or glands commonly, and its etiology is not yet clear, and the causative factors include air pollution, heredity and smoking. Early symptoms of lung cancer are mostly seen in coughing, which is often characterized by paroxysmal irritating cough without sputum or with little sputum, and some patients may also have coughing all the time. With the development of the disease, lung cancer may invade neighboring organs and tissues, manifesting as irregular hidden pain in chest, which may be aggravated when coughing. Coughing all the time, accompanied by occasional paroxysmal coughing, may occur. Due to the different degrees of lung cancer patients’ conditions, their coughing symptoms cannot be generalized. If patients have cough, they need to go to regular hospitals and undergo relevant examinations to clarify the cause of the disease. Once diagnosed with lung cancer, patients should actively cooperate with doctors to take relevant treatment measures to avoid delaying their condition.