Lung Cancer Causes

The reason behind why lung cancer a very common cancer among men and women is lung cancer causes are all around us.

Lung cancer causes includes:

1. Lung causes long-term exposure to inhaled carcinogens, especially tobacco smoke.
   Smoking is the main cause of lung cancer that contributes more than 80% of all lung cancer cases. Smoking also the main reason why lung cancer also common in women, and now it even more common than breast cancer. Nowadays trends in smoking among teenagers have increased lung cancer case.
   
   In few decades, smoking trends has increased not only men but also women. That is why lung cancer cases increase each year, even worse, kids also smoking, making lung cancer patient getting younger and younger.
   
   
2. The occurrence of lung cancer in nonsmokers, who account for less than 10% of cases, appears to be due to a combination of genetic factors.
3. Radon gas, asbestos, and air pollution may also contribute to the development of lung cancer.
4. Previous lung disease can also caused lung cancer. However, its case is rare.

The fact is some of lung cancer patient are not smoking, but they lived in neighborhood that most of them smoking.

Main Article: Lung Cancer Symptoms