Bleeding in the stool is not necessarily rectal cancer. There are some benign diseases that can also cause bleeding in the stool, such as hemorrhoids and anal fissures, which can show symptoms of bleeding. Some patients with rectal cancer will have bleeding problems, and certainly for the diagnosis of rectal cancer, bleeding may be an aspect that needs to be taken seriously. For rectal cancer, bleeding in the stool is a very common symptom, and routine judgment of rectal cancer bleeding can be made based on the amount and color of bleeding, which can be the preliminary judgment. One of the most important tests for rectal cancer is rectal examination, which should be done at the surgery department during the consultation. After the colonoscopy, a biopsy should be done and the diagnosis of rectal cancer can be confirmed only after the pathology is confirmed. In general, there are upper gastrointestinal bleeding and lower gastrointestinal bleeding in bowel cancer. Some rectal cancer patients show bleeding with blood in the stool. As a routine screening, rectal cancer should have a stool routine to see if the stool is positive for occult blood, which can be a preliminary screening, but a colonoscopy is needed to confirm the diagnosis.