Many people have “ten people nine hemorrhoids” concept, so many patients if there is perennial anal pain, most of them can tolerate to endure, and even the swelling out of the anus is also familiar with the blind. There are also a variety of perianal discomfort, still do not consult the doctor, many people also appeared many times blood in the stool. In fact, long-term blood in stool will not only lead to hemorrhagic anemia, prolonged prolapse of the swelling is easy to friction bleeding, mucus flow out of the anus to stimulate the skin, easy to trigger anal infection, aggravate the condition, and blood in stool is the earliest and the most common manifestation of colorectal cancer, and often patients are misdiagnosed as dysentery or hemorrhoidal bleeding, which leads to the detection of intestinal cancer when it is mostly in the middle and late stages. Bowel cancer pain is different from abdominal pain 1. Some bowel cancer patients do not have the early typical symptoms of blood in stool or constipation, but show vague abdominal pain. The etiology of pain in the abdomen is complex, and sometimes it is easy to miss the diagnosis of bowel cancer when kidney stones are detected; 2. Bowel cancer pain is different in nature from kidney stones, and it is suggested that vague pain in the abdomen should be considered as a bowel problem, and it is necessary to do a colonoscopy – early detection of bowel cancer, and the cure rate can reach 60%-70%; There are data indicating that colorectal cancer has become the high incidence cancer in China, with the incidence rate located in the 2nd place of male cancer and the 3rd place of female cancer. As the latent period of colorectal cancer is particularly long, Prof. Rong Wenzhou reminded that early screening is particularly important for high-risk groups. Seven groups of people should focus on rectal cancer screening The exact cause of colorectal cancer is still unclear, but according to clinical research, it is likely to be related to people’s dietary habits, family genetic factors, chronic diseases, bad habits and mental stress. 1.Happy to eat high-fat and high-protein people For the intestines, water is necessary. As a result, many people are due to insufficient water and dietary fiber supplementation in the diet, which induces related intestinal diseases. They mainly focus on high-fat and high-protein intake, such as animal protein, alcohol, fried food, etc., and are therefore significantly more prone to bowel cancer than the general population. Because these high protein low fiber food will affect the normal peristaltic rate of the intestine, resulting in feces stay in the intestine for a long time, easy to produce toxins, in the long run, the risk of cancer is higher. In fact, cancer can be induced at all ages, and this is also true for bowel cancer. However, clinical cases show that about 90% of patients are older than 40 years old. This shows that regular rectal screening is necessary for people in this age group. 3.People with long-term constipation and blood in stool Data show that about 80% of people do not know that blood in stool is a signal of bowel cancer. Long-term constipation may lead to dry stools, and toxins accumulated in the intestinal tract, so the cycle is repeated, severe cases can be induced by blood in the stool. Prof. Rong Wenzhou said that blood in stool may be a pre-cancer warning. 4.Related chronic disease population Although some chronic intestinal diseases may not necessarily develop into cancer, but the clinic shows that patients with more than ten years of chronic ulcerative colitis have several times higher risk of colon cancer than the general population; and patients with colorectal polyps, the risk is 22 times higher than that of the general population. Also included are bowel diseases such as adenomas of the colon and familial colonic adenomatosis. In addition, non-intestinal diseases may also increase the risk of colorectal cancer, such as schistosomiasis, long-term with chronic appendicitis, cholecystitis, or have removed the appendix and gallbladder of the population. 5, people with family genetic history About nearly a quarter of colorectal cancer patients may be mainly due to genetic factors. If there are adenomatous polyposis and hereditary non-polyposis colorectal cancer in the family, the risk of colorectal cancer is 2-4 times higher than that of the general population. 6, people with long-term mental depression Work, study and life may cause individuals to experience mental tension, and in serious cases, depression, tension and anxiety may occur. Psychological discomfort easily induced physiological changes, such as abdominal pain, diarrhea, frequent bowel movements and other symptoms, these symptoms are known as “irritable bowel syndrome”. Intestinal peristalsis is not normal, detoxification function is abnormal, the risk is higher. 7, long-term late night crowd Long-term late night can induce a variety of diseases, in terms of the intestinal tract, can lead to the accumulation of toxins, metabolism slowed down, long-term role, there is a risk of cancer. It can be seen that many intestinal diseases are due to bad habits and induced, for the above bad dietary habits of the population, we must do a good job related to health care, including dietary habits and lifestyle changes, otherwise the harm is not only the intestinal tract, and other diseases are also closely related.