In general, the lower abdomen pain with stool sensation can be considered as bacillary dysentery, ulcerative colitis, irritable bowel syndrome and other diseases caused. 1. Bacterial dysentery: is caused by Shigella dysenteriae and other infectious diseases of the intestinal tract, bacterial infection caused by the inflammation of the sigmoid colon and rectum and ulcers, the patient will appear abdominal pain, diarrhea, acute and severe sensation and other symptoms, typical symptoms of mucus, pus and blood stools. 2. Ulcerative colitis: refers to a kind of chronic non-specific intestinal inflammatory disease mainly involving the rectum and colon, related to the environment, genetics, immunity and other factors. Most of them are recurrent chronic course, which can be manifested as intermittent diarrhea, mucus, pus and blood stools, abdominal pain and a sense of urgency and heaviness. 3. Irritable Bowel Syndrome (IBS): It is a common intestinal dysfunction disease, mainly characterized by abdominal pain, abdominal distension and abdominal discomfort, accompanied by changes in bowel habits such as frequency, diarrhea, constipation, or diarrhea and constipation alternately. Lower abdominal pain with a feeling of stool may also be pelvic inflammatory disease, acute gastroenteritis, etc., it is recommended to consult a doctor in order to clarify the diagnosis, targeted treatment.