Among many cancers, lung cancer in China ranks first in terms of incidence and mortality, and is truly the “No. 1 killer of cancer”. According to the data released by the National Cancer Center, there are about 650,000 new cases of lung cancer in China every year, which seriously affects people’s normal life and work. After suffering from lung cancer, many people seem to be at a loss as to what to do, and they may seek medical help indiscriminately, which may delay the best treatment time. Can lung cancer be cured? Early symptoms of lung cancer are difficult to detect early lung cancer, especially peripheral type lung cancer, most of which do not have any symptoms and are not easily detected by patients. Only patients with lung cancer growing in certain special areas will have reactions, for example, hemoptysis and cough if it spreads to the bronchial tubes. It is very difficult for ordinary people to suspect that they have lung cancer just because they cough a few times. Therefore, lung cancer is very difficult to be detected in time, and once patients have related symptoms, 70% to 80% of them have already reached the middle and late stage. The development of lung cancer has a lot to do with external factors. Early detection and early treatment are necessary to avoid deterioration of the disease and make it more difficult to cure. Lung cancer prevention is more important than treatment: How to prevent it? Start with changing these habits to refuse smoking: Smoking is the most harmful to lung cancer, and even if one does not smoke, the inhaled second-hand smoke will increase the risk of lung cancer as well. Therefore, avoiding tobacco, or deciding to quit, is the most important decision you can make, and it is an important part of lung cancer prevention. Take precautions against haze: Haze is harmful to people mainly in this aspect of the respiratory system, which can cause or aggravate chronic pharyngitis and chronic bronchitis, and long-term exposure to this environment can induce lung cancer. Therefore, when hazy weather occurs, you should try to reduce outdoor sports, and you should consciously wear a quality mask to protect yourself when you go out. Maintaining proper physical activity: Maintaining physical activity is also a kind of cancer prevention, and participating in more outdoor exercises in daily life and work will play a positive role in cancer prevention. Relevant research proves that exercise will generate a lot of heat, cancer cells are much less tolerant to heat than normal cells, and a certain amount of exercise can effectively kill cancer cells. Diversified integration is conducted to develop a systematic program and implement treatment.