Stool after meals may be physiological reasons such as increased peristalsis, or pathological reasons such as irritable bowel syndrome, acute enteritis, hyperthyroidism and so on. 1. Physiological reasons: After eating, food stimulates the mucous membrane of the gastrointestinal tract, making the peristalsis of the gastrointestinal tract increase, which promotes the digestion of gastrointestinal contents as well as the emptying of the gastrointestinal tract, resulting in the urge to have a bowel movement. If there are no other symptoms, it is a normal physiological reaction to defecation. 2. Pathological causes (1) Acute enteritis: Inflammation of the intestinal tract caused by unclean diet and cold abdomen. It causes damage to the gastrointestinal mucosa and accelerated gastrointestinal peristalsis. Caused by inflammatory stimulation, it may also be accompanied by intestinal flora imbalance, and may appear to have a bowel movement after eating. (2) Hyperthyroidism: the main reason is that the patient secretes too much thyroid hormone, causing a series of symptoms similar to sympathetic overexcitation in patients with high metabolism, leading to excessive gastrointestinal peristalsis, and nutrients are expelled from the body before they are absorbed. (3) Irritable bowel syndrome: after eating, food stimulates the gastrointestinal nerves, which causes gastrointestinal dysfunction, weakened digestion and absorption, resulting in an increase in the number of bowel movements, which can be treated with oral nerve-regulating medications, such as ghrelin and vitamin B1, and at the same time, it is necessary to regulate the diet and maintain a happy mood. Immediately after the meal want to defecate, there may be other reasons for this, it is recommended to go to the hospital in a timely manner, improve the cause of clear, under the guidance of the doctor for targeted treatment.