The causes of abdominal pain and wanting to have a bowel movement but not having a bowel movement include irritable bowel syndrome, proctitis, rectal cancer and so on. 1. Irritable bowel syndrome: due to the strong sensitivity of the patient’s intestinal tract, after being stimulated, it will trigger spasmodic contraction of the intestinal tract, which will lead to pain in the abdomen, intention to poop, but no stool discharge. 2. Proctitis: due to the presence of inflammatory infection in the intestines, the inflammatory factor constantly stimulates the intestinal mucosa, triggering the mucosal bleeding, congestion, edema, hemorrhage and so on, which leads to abdominal cramps, feeling of intention to defecate, but no fecal discharge. 3. Rectal cancer: If the patient has a tumor occupying the rectal area, with the continuous growth of the tumor, it will press the rectal wall, causing the patient to have a feeling of urge to have a bowel movement and abdominal cramps, but no fecal discharge. If the patient has the feeling of small abdominal pain and wants to poop but cannot poop out, it is recommended that the patient go to the hospital in time. Improve the abdominal CT, ultrasound, gastroenteroscopy and other tests to clarify the cause of the disease, and follow the doctor’s instructions for medication to avoid delaying the condition.