Raising people’s awareness of tumor prevention and changing bad habits that may cause tumors, especially staying away from tobacco, play an important role in the prevention and treatment of lung tumors. The results of a large number of epidemiological studies show that smoking cessation can lead to a decrease in the incidence of lung tumors. A research report in the British Medical Journal points out that if men quit smoking before the age of 75, the “cumulative risk” of dying from lung tumors is 16%, while the “cumulative risk” of quitting smoking before the age of 30 is less than 2%, and even if people quit smoking in their middle age, the risk of suffering from lung tumors can also be reduced. Even if people quit smoking in middle age, it can also reduce the risk of lung tumor, so it can be seen that the earlier you quit smoking, the better. In recent years, in some European and American countries, such as the United States, the United Kingdom, and the Netherlands, with the implementation of laws and regulations restricting smoking, the mortality rate of lung tumors among men has been stabilized or declined. In the United States, the smoking rate of male population has been significantly reduced in the past 30 years, as a result of which the incidence curve of lung tumors has shown a downward trend in recent years, but on the contrary, the incidence rate of female lung tumors has increased, which is obviously related to the increase of smoking rate of female population in recent years. The results of a large number of studies at home and abroad suggest that patients with lung tumors should receive smoking cessation treatment. Relevant studies suggest that the 5-year survival rates of 65-year-old patients with early-stage lung tumors who continue to smoke and those who quit smoking are 33% and 70%, respectively, while the 5-year survival rates of patients with limited-stage small-cell lung tumors are 29% and 63%, respectively. Clearly, it is never too late to quit smoking, and even if you already have a lung tumor, quitting smoking can still have a significant impact on your prognosis. Since the lung tumors suffered by nonsmokers have some brand-new pathological features, they are more effective in responding to some therapies, especially some targeted therapeutic YAOs that have emerged in recent years. Follow-up investigation: after smoking cessation, the incidence of lung tumors showed a gradual decline. Within 1-3 years of quitting smoking, the incidence of lung tumor decreases by about 1/10; after 6 years of quitting smoking, the incidence of lung tumor decreases by more than half; after 15 years of quitting smoking, the incidence of lung tumor is similar to that of non-smokers. Heavy smokers (more than 15 cigarettes per day) have a significantly lower risk of developing lung tumors after reducing smoking by half, and the mortality rate of lung tumors decreases after stopping smoking, and the incidence of lung tumors decreases to roughly the same level as that of nonsmokers after quitting smoking for more than 10 years. The incidence of lung tumors will be reduced to the same as that of non-smokers after 10 years of smoking cessation. Warm reminder: after long-term smoking, the seeds of tumors have already taken root and sprouted on the soil, and the solution is to quit smoking as soon as possible to improve the soil where the seeds grow. Therefore, it is suggested that smokers should quit smoking as soon as possible, even the best YAO drugs can’t fight against the harm of tobacco on your body. If you are determined to quit smoking, you can ask your respiratory doctor to give you a prescription to help you develop a suitable smoking cessation program.