Lung cancer will not be passed on to the next generation directly through heredity, but it will increase the risk of lung cancer in the next generation; whether lung cancer can be cured or not depends on factors such as the type and stage of lung cancer; early stage non-small cell lung cancer can be cured after effective treatments, but advanced stage small cell lung cancer is more difficult to be cured. Whether lung cancer can be cured or not depends on the type and stage of lung cancer; the prognosis of non-small cell lung cancer is better than that of small cell lung cancer, and the prognosis of the same type of lung cancer is better in stage 1 or 2 than in stage 3 or 4. Therefore, for stage I non-small cell lung cancer, after surgical resection, the possibility of cure is high, and the five-year survival rate can be up to 70%; however, for small cell lung cancer, especially for stage III and stage IV small cell lung cancer, the possibility of cure is low, in which the five-year survival rate of stage III small cell lung cancer is only 10%, and the five-year survival rate of stage IV small cell lung cancer is only 3%. Patients diagnosed with lung cancer should actively cooperate with doctors for treatment, and maintain a good attitude and healthy lifestyle, all of which can help improve the prognosis.