What is the cause of bright red blood in the stool? What is this blood in stool symptom? How should I treat the bright red blood in stool? In fact, blood in the stool is an initial warning of anorectal disease, blood in the stool is divided into painless blood in the stool and painful blood in the stool, appearing bright red blood in the stool is painless blood in the stool. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. 1, hemorrhoids: blood in the stool generally occurs in the process of defecation or after the stool, is dripping blood or jet, blood is bright red, blood and feces do not mix. 2, anal fissure: pain is intense during the stool, blood dripping after the stool. 3, a variety of enteritis: because of the inflammatory effect, the integrity of the intestinal mucosa is destroyed, there is dark purple blood, secretions mixed in the stool, and accompanied by the symptoms specific to various types of enteritis. 4, anal papillitis and its hypertrophy: on the tooth line, the surface is covered with anal canal epithelium, occasionally visible bleeding. 5, rectal adenoma or villous papilloma: the disease often bleeds, with blood on the feces during each bowel movement, and occasionally with heavy bleeding. However, the tumor is long and tipped, anoscopy, the tumor is visible in the rectum, red in color, and can be tipped. 6.Proctal cancer: there is often bleeding and large amount of discharge, which is most likely to be misdiagnosed and missed. During manual diagnosis, the finger sleeve can be stained with blood, and hard lesions with different shapes, rough and uneven surfaces and uneven edges can be detected. The disease can also cause anemia when there is blood in the stool.