The difference between rectal cancer and hemorrhoids bleeding in the stool is the color of the bleeding, bleeding accompanied by symptoms and so on. 1. Bleeding color: rectal cancer patients usually have irregular bleeding in stools, and the bloody stools, accompanied by mucus, pus and blood, are dark red or black in color. And hemorrhoids are dripping blood after defecation, and the color is bright red. 2. Bleeding and accompanying symptoms: patients with rectal cancer will have unshaped stools, accompanied by diarrhea, abdominal pain, bleeding after defecation and other symptoms. While hemorrhoid patients will have pain around anus when defecating, without symptoms of diarrhea, abdominal pain, bleeding will be aggravated when defecating, and there can be blood when wiping in the early stage, and there will be jet bleeding in serious cases. If the patient bleeding in the stool is serious, should go to the hospital in time to find out the situation, and actively cooperate with the doctor for treatment.