Why do you get lung cancer?

Lung cancer patients do not smoke can also cause lung cancer, can be caused by the following factors: 1, internal factors: internal causes are genetic mutations. Non-smoking lung cancer, mainly caused by internal factors, driving factors that are caused by genetic mutations of lung cancer, is a common clinical phenomenon. So patients do not smoke, can also cause lung cancer;2, external factors: including air pollution, radiation, virus infection or the working environment has a large number of harmful substances to the lungs, etc., are important factors causing lung cancer. Long time inhalation of kitchen fumes is also an important factor in lung cancer.