There are several common reasons for having a bowel movement: the first one is acute enteritis. Often caused by eating unclean food, often accompanied by abdominal pain, watery stools, stools more often, there will be weakness, fever and other symptoms. The second type is chronic enteritis. Chronic enteritis is the recurrence of this diarrhea, a little bit of eating is not easy to appear diarrhea. The third type, intestinal polyps. Intestinal polyps tend to make patients appear this defecation feeling, always want to defecate and can not finish. The fourth type, intestinal tumors. In addition to the increased frequency, it may often be accompanied by other symptoms such as blood in the stool and changes in bowel habits. To confirm the diagnosis of this cause, it is best to do a colonoscopy related examination.