The vast majority of colorectal cancers are gradually transformed from colorectal polyps, and it is generally believed that this process takes about 5-10 years. Colon polyps are bulging lesions on the intestinal mucosa, which are not easily detected because they have few symptoms and rarely cause bleeding and obstruction. Most patients are discovered during physical examination or examination for other diseases. Removal of colon polyps can interrupt the occurrence of colorectal cancer. The former is caused by proliferative inflammation of the intestine and has very little possibility of malignancy, while adenomatous polyps are classified as precancerous lesions and have been recognized. Adenomas are classified as tubular adenomas, villous adenomas, and mixed adenomas, with the highest cancer rate for villous adenomas and the lowest for tubular adenomas. Adenomatous polyps may also be associated with genetics, chronic inflammatory irritation, lifestyle habits, chronic constipation, and other factors. Adenomatous polyps do not subside on their own and can grow slowly if left untreated, with a higher chance of carcinogenesis. Although inflammatory polyps are relatively safe, long-term inflammatory stimulation may also lead to adenoma development. Most experienced doctors can determine the benignity and malignancy under the naked eye, but the pathological diagnosis after biopsy is the gold standard. On the other hand, even if polyps are removed, there is a possibility of recurrence, so regular review is especially important. Generally, after removal of a single polyp, colonoscopy is required once a year, and it can be changed to once every 5-10 years after 2-3 consecutive years of examination without recurrence. For postoperative pathology suggests that polyps with villous adenoma, serrated adenoma and high-grade epithelial neoplasia are prone to recurrence and carcinoma, those who have the conditions can be reviewed more closely according to individual circumstances. The increasing high-fat, low-fiber diet in China may be an important reason for the increased incidence of colon cancer. Eating more green leafy vegetables, tomatoes, eggplants and carrots is beneficial to intestinal peristalsis and reduces the occurrence of polyps. Awareness about colon polyps 1.Colon polyps are diagnosed endoscopically and the nature includes inflammatory, proliferative, misshapen tumor, adenoma, cancer, etc. Further pathological examination is needed to clarify. 2.It is generally believed that more than 95% of colorectal cancers are adenomas in colorectal polyps, and colorectal adenomas should be treated as early as possible. However, not all adenomas will become cancerous, so there is no need to be blindly nervous. 3. Endoscopic treatment of polyps is carried out in most medium and large hospitals. The difficulty and risk of operation vary depending on the polyp site, size, morphology and pathological type. 4.Risks of endoscopic treatment include bleeding, perforation, incomplete removal of polyps, cardiovascular accidents and so on. Sometimes additional surgery may be required. 5.There is no medicine to prevent or treat polyps. The effective way is to review the colonoscopy or barium enema regularly and dispose of the polyps promptly. The doctor will make a comprehensive judgment according to each person’s situation. About screening 1.Starting age: 40 years old. 2. Target group: (1) All people with colorectal alarm symptoms such as blood in stool, black stool, anemia and weight loss. (2) People over 50 years old without colorectal cancer alarm symptoms. 3. High-risk and general-risk groups in the target population: High-risk groups: Those who meet any one of the following criteria (1) Positive fecal occult blood. (2) First-degree relatives with a history of colorectal cancer. (3) Previous history of intestinal adenoma. (4) History of cancer in himself/herself. (5) Change in stool habit. (6) Any 2 of the following: chronic diarrhea, chronic constipation, mucus and blood stools, history of chronic appendicitis or appendectomy, history of chronic cholecystitis or cholecystectomy, chronic mental depression, alarm signs (hypothermia, wasting, anemia, etc.). General risk group: those without any 1 of the above. The starting time and interval of screening varies from patient to patient.