The feeling of not being able to relieve the bowel movement and the sensation of falling and swelling may be caused by mixed hemorrhoids, colorectal inflammation and colorectal tumors. 1. Mixed hemorrhoids: blood in the stool, constipation, when fecal stimulation to the anus of the hemorrhoids, there can be a falling sensation phenomenon. 2. Colorectal inflammation: this kind of disease can appear diarrhea and constipation alternately, defecation habits, abdominal distension, abdominal distension, urgency and heaviness (the lower abdomen is uncomfortable, want to defecate very much, and have a feeling of incomplete defecation after defecation), mucus stools, and anus falling sensation and other symptoms. 3. Colorectal tumors: these diseases can present symptoms such as heaviness, change of bowel habit, feeling of dropping in anus, mucus, pus and blood stools, and so on. If it is difficult to distinguish the above diseases by clinical symptoms, colonoscopy can be used for differential diagnosis, and it is recommended to consult a doctor in time.