Colorectal cancer as the third most prevalent cancer in China after lung cancer and gastric cancer,according to the statistics of the 2018 Expert Consensus on Early Diagnosis and Screening Strategies for Colorectal Cancer in China, there are 429,200 new cases and 281,400 deaths every year, and the prevention and control situation is severe. Since the symptoms in the early stage of colorectal cancer are not obvious, they are usually found at an advanced stage, but there are often some warnings in the early stage of colorectal cancer! What are the early warnings of colorectal cancer? 1.Family history of colorectal cancer Colorectal cancer refers to malignant tumors of colon, rectum and anus, which is an autosomal dominant disease and is caused by mismatch repair gene defects in human body, especially if both parents suffer from this disease. It is reported that about 1/8 of familial cancer members or their offspring have colorectal cancer. 2.History of familial polyps in the colon Polyps mostly develop in adolescence and can become cancerous after 40 years old. Therefore, once patients are diagnosed with colorectal polyps, they should undergo total colon and rectal resection as soon as possible to prevent cancerous changes. Change of stool habit without any reason Change of stool habit refers to abnormal bowel sensation, incomplete defecation, dry and thin stool and change of stool frequency, which are the early manifestations of colorectal cancer. 4.Abdominal pain At the beginning of the disease, abdominal discomfort or hidden pain is related to defecation. When paroxysmal abdominal pain occurs, it is because the passage of stool is obstructed by the narrowing of intestinal cavity, which is seen in advanced stage patients. 5, blood in the stool Anyone with dark red blood in the stool, and continues to appear, gradually increasing, has diagnostic value. Do not treat it as “internal hemorrhoids” or “dysentery”, which is often seen in clinical misdiagnosis cases. 6.Progressive anemia Chronic blood loss and hematologic disorders in other parts of the body have been ruled out. 7, middle-aged and elderly people with unexplained loss of appetite, weakness and emaciation. In the “Suwen – four qi tune Shen Da Lun”: “Therefore, the sage does not treat the disease to treat the disease, not to treat the chaos to treat the chaos, this is also called. If a disease has been treated after it has become a disease, and a chaos has been treated after it has become a chaos, it is like thirsty and wears a well, and a bucket and casts a cone, is it not too late?” Chinese medicine emphasizes “treating the disease before it happens”, i.e. taking appropriate measures to prevent the development of diseases, i.e. preventing diseases before they happen and preventing changes after they happen. How to prevent bowel cancer? 1. Quit bad eating habits Stay away from greasy food and pickled food; eat less meat and more green vegetables. Research confirms that if a large amount of fiber is consumed and less protein fat is consumed, the risk of colon cancer will be reduced, on the contrary, if more meat and more fat are consumed and the intake of fiber is low, the risk rate of colon cancer will be increased. Therefore, we must include more coarse fiber vegetables in our daily diet, which can replenish the nutrients needed by the body, enhance resistance and immunity, and also prevent tumor occurrence. In modern society, life is fast-paced, work is stressful, there are many things like overtime, drinking and socializing, etc. Long-term irregular lifestyle can cause disorder of human biological clock, accumulation of toxins in the body, metabolic substances cannot be discharged normally, and long-term accumulation in the body leads to the occurrence of tumor. Avoid overworking, quit smoking and limit alcohol; regular lifestyle is good for health. 3.Physical exercise A lot of epidemiological studies found that the risk of colon cancer is closely related to obesity. And physical exercise is a good way to lose weight. Increasing physical exercise for obese people can not only increase the consumption of body fat and restore the body shape, but also effectively regulate the body functions, such as chronic inflammation, dysbiosis of intestinal flora and abnormalities of insulin and insulin-like growth factor, etc., which can reduce the risk of colon cancer. Colorectal cancer has a long process from precancerous lesion (adenoma) to malignant lesion, and it is one of the few malignant tumors that can be detected and treated early through screening, therefore, patients with risk factors of intestinal cancer are recommended to have regular colonoscopy.