The incurability of recurrent and metastatic cancers has elevated the understanding and research of cancer to the research of precancerous lesions, and the term “precancerous lesions” has gradually become familiar to the general public. The good thing is that people attach importance to cancer prevention, but the bad thing is that the name is related to “cancer”, and many patients do not know enough about it, which leads to worries and fears, and even cannot be relieved. In fact, there is not even a single cancer cell in the body of precancerous lesions, and the relationship between the two is similar to that between an egg and a chick. Without incubation conditions, an egg will always be an egg, and even with incubation conditions, not all eggs will become chicks. The future of an egg is not necessarily a chick, and the future of a precancerous lesion is not necessarily cancer. Some diseases in medicine are considered to have the potential to transform into malignant tumors, such as cirrhosis of the liver may develop into liver cancer, atrophic gastritis may develop into gastric cancer, cervical erosion may develop into cervical cancer, Barrett’s esophagus may develop into esophageal cancer, etc. These diseases are called precancerous lesions. These diseases are called precancerous lesions. The purpose of this concept is to prevent the risk of cancer to the greatest extent by shifting the gate of cancer prevention to the future. For example, mastopathy (those with poor BI-RADS classification) should be removed surgically; chronic atrophic gastritis and gastric ulcer can be treated with selective medication according to HP; chronic viral hepatitis should be checked regularly with liver function and liver ultrasound, and standardized treatment is needed once abnormalities occur; for familial polyps, colonoscopic removal is recommended; patients with cervical erosion should undergo regular gynecological examination and physical therapy when necessary, and pay attention to Patients with cervical erosion should undergo regular gynecological examination, physical therapy if necessary, and avoid bad sexual habits and sexual hygiene. Most precancerous lesions usually take years or even decades to develop into cancer, so when precancerous lesions are found, do not be alarmed, but set up the right attitude, “defy strategically, pay attention tactically”, treat reasonably, change bad habits, quit smoking for smokers, quit drinking for alcoholics, exercise actively to improve the body’s The body resistance, and to develop a good habit of regular physical examination.