Hematochezia is a common proctology disease. Once it occurs, it is necessary to conduct timely examination and treatment, which is very likely to be related to colorectal cancer. After getting older, many people's physical condition declines, and they are prone to gastrointestinal diseases, such as hemorrhoids, anal fissures, colonic polyps, and colorectal cancer. After the occurrence of these diseases, it is important to seize the time for treatment and take good care of the gastrointestinal tract and anal area daily to reduce the occurrence of infection. The main reasons for bloody stool are as follows: 1. "Nine out of ten men have hemorrhoids" has always existed in China, and men are more likely to suffer from hemorrhoids than women. Long-term sitting men are particularly prone to hemorrhoids. The bleeding caused by hemorrhoids is mostly intermittent stool bleeding. In severe cases, patients may have blood in every bowel movement, and the amount of bleeding is not fixed. However, this blood is not mixed with the stool, but adheres to the surface of the feces. It may also appear as drops or a large amount of blood spraying after defecation, accompanied by a feeling of pain. 2. Anal fissure Due to constipation, diarrhea, internal sphincter relaxation, congenital defects, and other reasons, the incidence of anal fissure accounts for about 20% of all perianal diseases. According to clinical data, the most typical symptoms of anal fissure are pain and bloody stool. 3. Intestinal inflammation Inflammation of the small intestine is also a common cause of bloody stool, mainly including bacterial dysentery and ulcerative colitis. These diseases can damage the intestinal mucosa, leading to blood vessel rupture and bleeding. However, unlike the above two diseases, intestinal inflammation is more often manifested as intermittent bloody stool with less bleeding, and the feces are often mixed with pus, mucus, and other symptoms. In addition, when intestinal inflammation occurs, patients may also experience symptoms such as abdominal distension, pain, and fever. 4. Intestinal polyps There are many types of intestinal polyps clinically, such as inflammatory, hyperplastic, and adenomatous polyps. Clinical studies have shown that adenomatous polyps are more likely to induce bleeding, and the bleeding site will vary depending on the location of the polyps. Adenomatous polyps in the rectum may appear during bowel movements, possibly as anal fissures, with adherent bloody stool on the surface of the feces. If there are too many polyps in the colon, there may be a mixture of stool and blood. 5. Colorectal cancer Hemorrhage on the mesenteric artery is not an early symptom, but becomes more common in the middle and late stages, and the bloody stool symptoms will become more apparent. When the stool is mixed with blood, the site of cancerous bleeding is far from the anus, and the patient may excrete black tarry stool.
