This condition depends on what is causing it to decide whether it is serious or not. There are several diseases that can generally cause such symptoms, the most common being hemorrhoids, which are the most prevalent disease in anorectology, and the main symptom of internal hemorrhoids is blood in the stool, which is fresh in color and not obviously painful. This is due to the fact that the innervation of the mucosa of internal hemorrhoids is vegetative and there is no obvious pain, and the internal hemorrhoids are located closer to the anal opening, so the blood in the stool is fresh. If treated conservatively, the symptoms can be controlled in general, but if it does not heal for a long time, it may cause serious complications such as anemia. Therefore, even if it is caused by internal hemorrhoids, it should be treated aggressively. Another condition that can be more serious is low rectal cancer. Since low rectal cancer can also present with bright red blood in the stool, many times there is no obvious pain, but only a feeling of anal swelling and a recent change in bowel habits. Therefore, this is a situation that cannot be ignored. When such symptoms appear, you should go to the anorectal department of a regular hospital for examination at the first time to make a clear diagnosis. It is better to do e-colonoscopy to exclude the possibility of rectal cancer.