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    Lung Cancer - Cause

    More than 8 out of 10 lung cancers are caused by smoking.3Tobacco smoke contains carcinogens-substances that cause cancer. These substances damage lung cells, and over time the damaged cells can turn into lung cancer.

    The more you smoke and the longer you have smoked, the higher your chances of getting lung cancer. You lower your chances when you quit or cut down on how much you smoke.

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    Lung Cancer Symptoms: What You Should Know

    Lung cancer usually has no symptoms in its early stages. When they start to appear, they can include: Chronic, hacking, raspy coughing, sometimes with mucus that has blood in it Respiratory infections that keep coming back, including bronchitis or pneumonia Shortness of breath that gets worse, wheezing, lasting chest pain Hoarseness Swelling of the neck and face Pain and weakness in the shoulder, arm, or hand Fatigue, weakness, loss of weight and appetite, fever that...

    Read the Lung Cancer Symptoms: What You Should Know article > >

    A few people get lung cancer after being exposed to other harmful substances, including asbestos, radioactive dust, radon, or radiation such as X-rays.

    Cancer also may be caused by gene changes (mutations) that occur as you get older.

    WebMD Medical Reference from Healthwise

    Last Updated: November 14, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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