Wanting to go to the toilet to defecate after eating may be a normal physiological phenomenon, or it may be related to diseases such as irritable bowel syndrome and chronic colitis. 1. Normal physiological phenomenon: when the human body begins to eat, food will stimulate the gastrointestinal tract to accelerate peristalsis, so that the residues stored in the intestinal tract to run downward, which leads to the appearance of the bowel movement. At this time, as long as the stool is normal in texture, and there is no abdominal pain, diarrhea and other symptoms, it is usually a normal physiological phenomenon. 2. Irritable Bowel Syndrome (IBS): Compared with normal people, patients with IBS are more susceptible to certain stimuli. For example, when the mood, temperature changes, in the cool wind and cold stimulation, in a state of anxiety and tension, can lead to the desire to go to the toilet. It can be manifested as a need to go to the toilet after eating. 3. Chronic colitis: when suffering from chronic colitis, after eating food can stimulate the gastrointestinal tract, promote peristalsis of the colon, which leads to a sense of urgency. When you want to go to the toilet after eating, it is recommended that you go to the hospital as soon as possible to rule out other causes, so that you can carry out targeted treatment under the guidance of the doctor.