Does quitting smoking or relapse increase the chance of developing lung cancer?

Quitting smoking or relapsing after quitting smoking may increase the risk of lung cancer. Smoking is one of the leading risk factors for lung cancer.

First, it will not increase

1. Non-smokers: For people who have never smoked, even occasional exposure to secondhand smoke does not have much effect on the body, so it does not increase the risk of lung cancer.

2. Newly started smokers: If a long-time non-smoker has only recently started smoking, then they may be at a higher risk of lung cancer, but this risk is generally lower and the risk can be reduced by stopping smoking.

Second, it will increase

1. Regular smokers: For those who smoke more than 20 cigarettes a day, their risk of lung cancer increases significantly. This is because the harmful substances in tobacco can damage lung tissue and promote abnormal cell proliferation, which increases the likelihood of lung cancer.

2. Former smokers: Although they have quit smoking for many years, the risk of lung cancer in these people will also increase because the harmful substances in tobacco are still present in the body.

3. Long-term smokers: For those who smoke for a longer period of time, such as those over the age of 40, the risk of lung cancer will also increase accordingly.

Quitting smoking or relapsing after quitting smoking may increase the risk of lung cancer. To prevent lung cancer and reduce the risk of developing the disease, people are advised to avoid smoking or using other tobacco products as much as possible.