Early clinical manifestations of lung cancer include cough, and some patients may have symptoms such as blood in sputum and hemoptysis, but they are atypical and unrepresentative, so one cannot rely on the symptoms to judge whether it is early stage of lung cancer or not. However, they are not typical and cannot rely on symptoms to judge whether it is early stage lung cancer or not. Due to the differences in personal situation, specific clinical symptoms should be judged according to one’s own situation.
Lung cancer is a common primary malignant tumor of the lungs, and its cause is not yet clear. Causative factors include air pollution, ionizing radiation, smoking, improper diet, viral infection and so on.
In general, most patients with early stage of lung cancer often have symptoms of coughing, which often manifests as no or little sputum, showing paroxysmal irritating cough. Some patients may also have symptoms such as blood in sputum, hemoptysis, dyspnea, hoarseness and so on.
Once patients are suspected to have early symptoms of lung cancer, they need to go to regular hospitals in time for relevant examination to find out the cause of the disease.