”Cancer is not scary.” Medical professionals always comfort patients in this way, but some information shows that the overall 5-year survival rate of lung cancer is only 13.9%, and the survival rate of lung cancer at different stages varies greatly. For example, the 5-year survival rate of inoperable advanced lung cancer is only 2-3%; the 5-year survival rate of mid- to late-stage lung cancer that can be surgically removed is about 20-40%; while the 5-year survival rate of early-stage lung cancer, especially those below 2 cm in diameter, can reach 90-100%. Such a disparity in survival rate can only illustrate one thing: the most effective and critical aspect of lung cancer diagnosis and treatment is time. Only early detection, early diagnosis and early treatment can effectively improve patient’s healing and increase survival rate. However, because there is no nerve distribution in the lung, lung cancer is painless in the early stage, so it is difficult to be perceived from the symptoms, and then it has to be detected through auxiliary examinations. The recognition of chest X-ray is relatively low, and experts say that CT is more effective. During 1994-2005, the International Action Plan for Early Lung Cancer Screening applied low-dose spiral CT to screen 31,567 asymptomatic people with lung cancer risk (history of smoking or risk of occupational exposure such as asbestos and beryllium exposure). The results identified 484 lung cancer patients, 85% of whom had clinical stage I lung cancer (i.e., early-stage lung cancer). 302 of these patients were treated with surgery within 1 month of diagnosis and had a 10-year survival rate of 92%. Therefore, experts recommend that people who are 40 years old or older, or have a long history of smoking with a smoking index of 400 years or more (the number of years of smoking multiplied by the number of cigarettes smoked per day), or work in a closed environment for a long time, or work in an environment with many dust particles for a long time, or have a family history of lung cancer, should receive a chest CT examination at least once a year to help in the early detection and treatment of lung cancer. Eating “white food” often can clear lung and moisten lung With the increasing incidence rate, people have paid more attention to the prevention methods of lung cancer. Many people like to wear masks to block PM2.5, but experts say it hardly works. It is better to reduce outdoor activities on cloudy days and close doors and windows indoors; when coming back from outdoors, it is better to rinse the nasal cavity and gargle; indoor green plants that can absorb dust can also be planted; it is not recommended to exercise in the morning before the sun comes out because the weather is not very good at that time and it is more harmful to the body. In addition, Chinese medicine believes that often eat “white food” has the effect of lung cleaning and lung moistening, such as white radish, yam, white fungus, snow pear, white chrysanthemum, lotus seeds, almonds, etc. are good choices.