Data show that colorectal cancer has become the third most common malignant tumor in China, with an average of 1 person diagnosed with colorectal cancer every 1.5 minutes. According to the introduction, colorectal cancer includes colon cancer and rectal cancer, and colorectal cancer is the third most common malignant tumor in the world, causing nearly 600,000 deaths every year. The incidence and mortality rate of colorectal cancer in China have been rising rapidly in recent years, and colorectal cancer ranks third in tumor incidence. With urbanization and population aging, the incidence of colorectal cancer in China is expected to continue to rise in the future, and the situation of prevention and control of colorectal cancer is very serious. What are the hazards of colorectal cancer? 1. The intestinal cavity of the left half of the colon is narrower, and the stool becomes very sticky and shaped after passing through, and the cancer occurring in this part is invasive cancer. Since the intestinal cavity is circularly narrowed, patients will have intestinal obstruction at an early stage, and in serious cases, acute obstruction will occur. 2. As the cancer cells of colon cancer break down and lose blood, toxins are absorbed, resulting in anemia, fever, fatigue, emaciation, and swelling. The main harm caused by colon cancer to patients is anemia and wasting. 3. The right hemicolectomy lumen is wider, and the stool becomes very thin after passing, and the colon is rich in blood and lymph, and has strong absorption ability. Most of the cancer cells are soft cancer, which can easily break down and necrosis, thus leading to bleeding infection. Clinically, it mainly focuses on toxic symptoms, and in serious cases, intestinal obstruction may appear. How to prevent colorectal cancer 1.Diet in appropriate amount and time. As a common malignant tumor in the gastrointestinal tract, the occurrence of intestinal cancer has a great relationship with our daily eating habits. In particular, dinner should not be eaten too late and too full. After middle age, the digestive tract function is no longer as strong as that of young people, so if we eat dinner too late and too full, it is easy to cause incomplete digestion and produce a lot of harmful substances accumulated in the intestine, which greatly increases the risk of intestinal cancer. 2. Eat more coarse grains and vegetables. Compared with refined grains, coarse grains contain more and richer nutrients, and more importantly, more dietary fiber. Dietary fiber is beneficial to the digestive tract, which can promote intestinal peristalsis and reduce the deposition of intestinal waste, thus greatly reducing the probability of intestinal cancer. In addition, vegetables are also good for the intestinal tract, especially leafy vegetables, rich in vitamins and dietary fiber, is a good partner of intestinal health. 3, reduce fat intake. High-fat, high-cholesterol food is not only the enemy of the heart and blood vessels, but also a major hidden danger to intestinal health. For example, lard, fatty meat, animal offal and other foods, if eaten too much easily induced colon cancer. These foods are generally rich in saturated fatty acids, which are harmful to the human body in many ways, with the digestive tract being one of the most common. Substitute unsaturated fatty acids such as olive oil, will have a good effect. 4, on-demand supplementation of vitamin E. Medical research has shown that lack of vitamin E may induce colon cancer. As a natural antioxidant, vitamin E is beneficial to all aspects of our body. Therefore, to prevent colon cancer, we may eat more foods rich in vitamin E in our daily life, such as walnuts, seafood, dairy products and so on. 5.Supplement more selenium. Selenium is one of the elements that have been widely proved to be closely related to cancer, and the lack of selenium may lead to the increased incidence of rectal cancer. Common foods with more selenium include garlic, asparagus, mushrooms, sesame, etc., which are common foods. Increase their proportion in the diet to stay away from the risk of intestinal cancer. 6.Be careful to eat sweet food after meals. For middle-aged and elderly people who have bad eating habits, they should pay special attention to prevent various kinds of intestinal cancers, one of the important points is not to eat sweets during or after dinner. If high-calorie sweets are added to the dinner, it will add more burden to the intestines. For the sake of intestinal health, should correct the bad habits of dinner intake of sweets. 7, active participation in sports. Although more exercise is always good for health, it has a direct impact on the prevention of intestinal cancer. Exercise can balance daily dietary intake and help intestinal peristalsis, which is conducive to excretion through the intestinal tract and reduces the accumulation of harmful substances in the intestinal tract, thus directly reducing the incidence of various kinds of intestinal cancers.