Swimming with stomach pain and farting may be due to the lack of warm-up exercises during swimming, gastrointestinal stimulation or swimming just after eating. 1. No warm-up exercises: not enough warm-up training before swimming will cause many abnormal reactions, stomach pain is just one of them, it is recommended that before going into the water to carry out appropriate exercise, such as leg press, shoulder turn, etc., to move every joint of the body. 2. Stimulation of the stomach and intestines: When swimming, the stomach and intestines are stimulated by the cool water, which can cause gastrointestinal discomfort and lead to stomach pain and farts. 3. Just after eating: just after eating to go swimming, due to the stomach and intestines by the water pressure, will affect the digestive system of digestion and absorption function, it is easy to stomach pain fart, or vomiting symptoms, it is recommended to eat an hour before swimming. It is recommended to warm up before swimming to prevent discomfort, or rest for a period of time after meals in swimming, swimming discomfort, it is recommended to stop immediately, timely medical attention.