Lung cancer usually has no symptoms in its early stages. When signs of the disease start to appear, they can include: Chronic, hacking, raspy coughing, sometimes with mucus that has blood in it. Changes in a cough that you've had for a long time. If you have any of these symptoms of lung disease, especially an ongoing cough, blood-streaked mucus, wheezing, hoarseness, or a lung infection that keeps coming back, see your doctor. You’ll get a thorough checkup, and you may also get X-rays or other tests.This article will explain what lung cancer is 肺癌咳嗽 .