Cancer is still a fickle-minded disease, but extensive research into the subject has helped people find some major risk factors behind cancer.
- Smoking: Smoking remains the biggest risk factor for lung cancer. The tobacco in cigarettes is made out of more than 7000 chemicals, many of which are carcinogenic. All forms of tobacco use can increase the chances of lung cancer. This includes cigar smoking, or even pipe smoking. Even infrequent smokers are about 10% more likely to get lung cancer than those who do not smoke at all. Smoking can actually cause cancer in a number of places- the lungs, mouth, throat, larynx, nose, bladder, stomach, blood, etc.
- Secondhand smoking: Secondhand smoke is when a person inhales the smoke from the cigarettes or cigars of those smoking around them. Secondhand smoke is about as bad as smoking itself. In the USA, about 3000 people who have never smoked a cigarette in their lives are diagnosed of, and die of lung cancer because of secondhand smoking.
- Radon: Radon is a natural gas that emnates from rocks and dirt. It can be found trapped in buildings and houses. It is an undetectable gas and it is known to cause lung cancer in 20,000 people every year.
- Family History: If anybody in your biological family has had lung cancer, chances are high you will develop it too.
- Other chemicals and substances: Exposure and overexposure to substances like arsenic, asbestos, silica, chromium, etc. can cause lung cancer, as well.
- Radiation Therapy: Cancer survivors who have already received radiation therapy stand a chance of getting lung cancer if the radiation therapy was to the chest area.