Stomach pain from eating watermelon is related to having a weak spleen and stomach, in addition to irritation of the intestinal mucosa. Many people have a cold spleen and stomach due to their constitution and poor eating habits, and these people have functional problems with their digestive system. Watermelon is a cold food, and people with a cold spleen and stomach will experience bloating and belching in the stomach when they eat cold food, which can also cause pain in the stomach. Watermelon is not only a cold food, but also has a large water content. When consumed in large quantities, it will not only dilute gastric juices, but also stimulate the gastrointestinal mucosa because it is too cold, which will induce excessive secretion of gastric acid and aggravate the stimulation of the gastric mucosa, so the patient will show stomach pain. When eating watermelon should pay attention to only a small amount of intake and avoid eating a lot, especially the spleen and stomach cold people should reduce the intake of watermelon.