A few days ago, he brought his mother, who had been bleeding in the stool for a long time, from her hometown to Beijing for radical surgery of colon cancer. Director Wang is a clinician himself, so why did his mother not receive timely treatment even though she had blood in her stool for so long? This also starts from the impression that blood in stool leaves to everyone. It is said that “nine out of ten people have moles”, plus with economic development, the pace of life is getting faster and faster, high-fat, high-energy diet structure and sedentary lifestyle promotes the increased incidence of hemorrhoids, however not all blood in the stool is due to hemorrhoids. The definition of blood in the stool is simple yet complex, simple in that it refers to blood in the stool and complex in the way the stool and blood are combined, mainly divided into those where the blood is not visible to the naked eye on the surface of the stool and those where the blood is visible. Among the blood in stool that can be seen by the naked eye, it can be divided into blood on the surface of the beginning of the stool, blood on the surface of the stool during the whole process of defecation, and blood mixed with the quality of the stool, etc. In addition to hemorrhoids, peptic ulcers, intestinal polyps, inflammatory bowel lesions, and gastrointestinal malignancies are the most common diseases that cause blood in the stool, while peptic ulcers, multiple intestinal polyps, and inflammatory bowel polyps are all diseases with a high tendency to become cancerous. Peptic ulcers commonly have blood in the stool mainly in the form of black stool or positive fecal occult blood test. Since bleeding from upper peptic ulcers fades to bright red after the action of gastric acid in the gastrointestinal tract, it is generally not easy to see fresh blood in the stool due to ulcers. Peptic ulcer is a highly prevalent disease in China, and most of these diseases can be cured by standardized and adequate treatment and regular review. However, because most people think they know more about such diseases, they often buy some acid-suppressing drugs or gastrointestinal mucosal protectors and take them on their own, taking “no pain is good” as the starting point, without regular treatment and regular review, they often do not even know that early cancerous changes have occurred in the disease. It is not until the pain is difficult to control, the number of black stools gradually increases, the weight loss and weakness, loss of appetite and a series of other symptoms appear that the patient goes for examination, which is often in the middle and late stages of the disease and loses the best treatment opportunity. Therefore, if you suffer from this kind of disease, the first thing is to carry out standardized treatment and timely gastroscopy biopsy when the disease recurs or the symptoms change, so as to prevent the occurrence of cancer at an early stage. Intestinal polyps lead to blood in the stool mainly because when the stool passes through the polyps, the friction causes the local surface of the polyps to rupture and bleed, which can be seen throughout the stool with blood. Family hereditary colon polyp is one of the most important high-risk factors for colorectal cancer and has a high tendency to become cancerous. The main treatment is to remove the polyp to eliminate the root cause and completely eliminate the possibility of polyp cancer. For the excised polyps, pathological section is needed to exclude the possibility of early cancer. A single excision does not guarantee permanent immunity, and periodic colonoscopic review is needed to clarify whether there are new polyps or recurrent cancerous lesions at the root of previously excised polyps. Ulcerative colitis and Crohn’s disease are both inflammatory diseases of the intestine, and their bloody stools are mainly mucopurulent and bloody in nature, which differ greatly from those caused by hemorrhoids or intestinal polyps and are not difficult to distinguish. Ulcerative colitis and Crohn’s disease represent inflammatory diseases of the intestine for which there is no cure and which have a high risk of cancer in the long term. Therefore, whether it is blood in the stool caused by the above-mentioned diseases or directly caused by malignant tumors of the digestive tract, it should be taken very seriously and not simply “fooled” by hemorrhoids or constipation. Therefore, we can say that blood in stool is an alarm signal of digestive tract tumor, so we can sound the siren at an early stage to eliminate the tumor in the bud!