Patients with this condition should consider the following diseases: 1, hemorrhoids, which is the most common disease caused by blood in stool in the anorectal department, usually painless, but if it is triggered by drinking or eating spicy food, it can be accompanied by burning pain in the anus, treatment can be conservative treatment, the application of suppositories and creams to stop the bleeding of the anus, if the effect is unsatisfactory, consider surgical treatment. 2, anal fissure Anal fissure, usually accompanied by severe tearing pain in anus and constipation, can be treated conservatively by applying suppository and ointment to anus and local medication sitz bath in anus, if the effect is unsatisfactory, then surgical treatment can be adopted. 3, there is another situation that can not be ignored, that is, low rectal cancer, which also has blood in stool with bright red color, and is usually accompanied by anal distension and recent change of bowel habit. Therefore, if patients have such symptoms, they should go to the anorectal department of regular hospital for examination at the first time in order to make a clear diagnosis and then decide the corresponding treatment plan, and it is better to do electronic colonoscopy to exclude the possibility of malignant tumor of the rectum.