Running after meals, abdominal pain may be due to physiological factors such as stomach shock, acute gastroenteritis, gastrointestinal smooth muscle spasm. 1. Physiological factors: after eating food will remain in the stomach memory for a period of time, at this time the stomach is full state, if you run immediately after the meal, the body’s activities will make the stomach shock, stomach shock will pull the mesentery, causing abdominal pain. 2. Acute gastroenteritis: If there is unwashed food, expired moldy food or food containing toxic and harmful substances in the meal, it may cause acute gastroenteritis, which starts rapidly and shows symptoms such as abdominal pain in the process of running after meal. 3. Gastrointestinal smooth muscle spasm: when running, the blood will be diverted to the limbs, resulting in insufficient blood supply to the digestive tract, causing gastrointestinal smooth muscle spasmodic pain. Generally, it can be relieved after resting. Running after meals, abdominal pain may have other reasons, you can go to the hospital to improve the relevant examination to clarify the situation.