Bowel cancer stool bleeding may be on the surface of the stool or mixed in the stool. Bowel cancer may be caused by heredity, age, environment and other factors. Early symptoms are not obvious, with the progress of the disease, symptoms such as change of bowel habit, change of stool trait, abdominal pain, abdominal mass and so on may appear, and when it is serious, there will be systemic symptoms such as anemia, cachexia, fatigue and so on, and mucus will appear in stool, and the symptom of blood in stool will appear after the cancer invades blood vessels and leads to blood vessel rupture. After the symptoms of bleeding in stool appear, it is recommended to go to the hospital for consultation and examination in time, and actively carry out relevant treatments under the guidance of physicians after diagnosis of the disease. In normal times, it is necessary to develop good dietary habits and defecation habits, drink more water, eat more fiber-rich food, defecate regularly to prevent constipation.