Colorectal cancer is known as the “invisible killer” that seriously threatens human life and health. It has almost no symptoms in the early stage, and when patients have symptoms such as blood in stool and then go to the hospital for examination, it is often already in the late stage and misses the best treatment time. The early symptoms of colorectal cancer are not obvious, if the following symptoms suddenly appear, you must pay more attention and go to hospital for screening as early as possible: colorectal cancer has pre-cancerous changes, if you can detect it by certain means, early detection, intervention and treatment, you can recover. 1.Overweight or obesity The risk of developing and dying from colorectal cancer is higher for overweight or obese (very overweight) people than for ordinary people. Overweight increases the risk of colorectal cancer in both men and women, but this correlation is stronger in men. 2. Lack of exercise If you don’t exercise, the chance of colorectal cancer increases. Regular exercise can help reduce the risk of cancer. 3.Excessive intake of red meat processed meat High levels of red meat (such as beef, pork, lamb or liver) and processed meat (such as hot dogs and some lunch meats) in the diet can increase the risk of colorectal cancer. Smoking Long-term smokers are more likely to develop and die from colorectal cancer than non-smokers. 5. Alcohol abuse Colorectal cancer has been shown to be associated with alcohol abuse. It is recommended that men have no more than two drinks a day and women have no more than one. Nowadays, people eat well, but high-calorie, high-fat, high-protein and low dietary fiber diets may become the accomplices of colorectal cancer. Because the more you eat, the better you eat the more excretory pressure in the intestine, and the large intake of animal protein and fat will easily produce many toxins. High protein (referring to animal protein), high fat diet in the intestinal tract decomposition, can produce methylcholanthrene and unsaturated polyhydrocarbons and other two strong carcinogens. There are more people “ruin” intestines, high-fat diet will cause bile acid metabolites in the stool (deoxycholic acid and stone bile acid), cholesterol metabolites (steroids and solid ketones), bacteria β-glucuronidase activity are increased, these are carcinogens, some are carcinogenic, coupled with infrequent exercise, it is easy to make these These are carcinogens and carcinogenic substances, coupled with infrequent exercise, it is easy for these harmful substances to accumulate in the intestines. The stomach depends on nourishment, the intestines depend on clean, know how to stop eating in moderation to be happy. “can” mainly refers to the rational arrangement of meals, eat more crude fiber-rich food, try to eat a little vegetarian, food types as far as possible to fresh, light, miscellaneous; “and stop” mainly means that the dinner tableware is also as small as possible, each meal to eat a little less, early Put down the chopsticks a little bit earlier, and eat less meat, fast-fried and pickled food.