Cancer often appears in middle-aged and elderly people, and nowadays, more and more young people are suffering from colorectal cancer. Many people often eat some noodles and ham, which can easily cause the gastrointestinal function to be affected, so we need to pay attention to the changes of gastrointestinal function and pay attention to a reasonable diet structure. Feature 1: The main symptoms of colorectal cancer are blood in stool and abdominal pain. Therefore, although the clinical manifestations of colorectal cancer are diversified and atypical, blood in stool and abdominal pain are still typical symptoms, which is still important for the study of colorectal cancer Feature 2: The prognosis of colorectal cancer in young people is worse than that of middle and old people, which may be related to the higher incidence of hypofractionated cancer in young people, and the 5-year survival rate of hypofractionated cancer in young group is lower. Most of them are accompanied by lymph node metastasis of tumor. Therefore, young people should pay attention to medical examination and actively prevent colorectal cancer. Feature 3: There is a slight increase of female colorectal cancer patients among young people in China, but the ratio of male to female incidence is basically the same, and there is almost no difference in incidence rate. The reason for the relatively higher incidence among young women may be related to the high level of female estrogen caused by certain factors. Because female estrogen can affect cholesterol metabolism and consequently the production of bile acids, the incidence of colorectal cancer is relatively higher. Feature 4: The incidence of colorectal cancer among young people in China is increasing year by year, which is significantly higher than that of young people in foreign countries. Therefore, clinical attention should be paid to it. Feature 5: Because rectal-anal finger examination is simple and easy to perform, it can significantly improve the early diagnosis rate of rectal cancer. Therefore, for patients with symptoms such as blood in stool, change in bowel habit and change in stool character, rectal finger examination can be performed in time, and if there is blood in finger examination, other examinations such as colonoscopy should be added to improve the early diagnosis rate. Feature 6: The proportion of right hemicolectomy patients in China has increased, so the clinical practice of screening colon cancer often using sigmoidoscopy is no longer appropriate, and whole colonoscopy should be adopted to make a comprehensive diagnosis. Feature 7: The incidence sites of colorectal cancer are basically the same among patients of the same age group, with rectum and sigmoid colon being the best sites. And there is no obvious relationship between the preferred site of colorectal cancer and age. We need to pay attention to this disease, and in our daily life, we need to treat this disease in time, and pay attention to the adjustment methods, effective health care, to avoid causing more trouble, and usually pay attention to more rest, and pay attention to self-care methods, comprehensive self-care, in order to avoid causing more harm, I hope you pay attention to your body changes, effective treatment, so as to avoid The result is that the function of the large intestine is affected.