This is often due to the narrowing of the anal opening, which has several causes: 1, hemorrhoids, mixed hemorrhoids are more obvious, due to the narrowing of the lumen caused by hemorrhoids and caused by poor stool discharge, which is a common clinical cause. 2, proctitis, rectal ulcer, most of the rectal mucosa is stimulated and caused by the feeling of defecation, not necessarily how much stool, there may be The most common reason for this is that the rectal mucosa is irritated, which leads to a neurological reflex, causing an increase in the number of stools. 3, rectal occupancy, if there is intestinal cancer or tubular adenoma, can lead to rectal stenosis and cause poor bowel discharge, often this situation needs to pay attention to diet, at the same time need to improve the colonoscopy examination to further clarify the diagnosis, according to the results of the symptomatic treatment.