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The lung cancer is this harbor male the most familiar cancer, and be known as the majority of the more than 40 years old male.Smoking or inhale second-hand smoke over a long period of time, is all lung cancer of main become because of.BE exposed in some chemicalses in the air or building material over a long period of time because of the industry and the occupation relation in addition, if asbestos etc., all increase a chance of suffering from the lung cancer.The lung cancer had no obvious disease to advertise for generally in early days, with condition depravation, the lung cancer will influence circumferential lung organization, causing to keep on to bring blood, chest lung to was subjected to infection repeatedly in a cough, phlegm or through the long and difficult , voice hoarse, the chest was unwell, a cough or deep breathing feel ache, appetite not to flap, the weight descended, and easily tired etc. symptom.According to the covariance, ten personages who die in lung cancer, 9 are smokers, so quit smoking is the best prevention method.