Often feel anal bowel movement is not clean, need to consider the following situations: first, whether there is hemorrhoids, most people will exist internal hemorrhoids, there will be a drop of bleeding after stool or ejection of blood, such as internal hemorrhoids is not very serious no obvious defecation is not clean feeling, if the II, III degree of internal hemorrhoids will appear more obvious defecation is not clean feeling. External hemorrhoids in addition to pain and discomfort and other symptoms, this bowel movement will also be more obvious. Second, anal papilla hypertrophy, hypertrophied anal papilla prolapse will affect the smooth line of defecation, will also appear the above feeling. Third, rectal polyps, rectal polyps, in addition to the feeling of impure defecation, but also complicate the change of defecation habits, such as constipation or diarrhea, blood in stool, mucus stool, and even abdominal pain, abdominal distension. Therefore, if long-term anal defecation, need to consult a doctor in time for anoscopy or electronic colonoscopy, to clarify the cause.