Eating grapes with stomach upset is related to the low temperature of grapes, too much intake, as well as their own gastritis, gastric ulcer and other factors. The grapes themselves are flat fruits with the function of nourishing qi and blood and benefiting the liver and kidneys, so eating them properly will not cause stomach discomfort. However, some people like to eat chilled grapes when eating grapes, the temperature of such grapes is relatively low, and suddenly into the stomach, will cause stimulation of the mucous membrane of the stomach wall, resulting in stomach spasms and contractions, and cause stomach discomfort. Once a large amount of grapes are consumed, it will not only lead to excessive secretion of gastric acid, but also affect the peristaltic function of the stomach, especially for those who suffer from weakness of the spleen and stomach and indigestion, which will aggravate the condition. Some people suffer from gastritis, gastric ulcer and other diseases, these people will eat grapes, will inevitably cause violations of the gastric mucosa, so will be accompanied by the symptoms of stomach distress.