Whether you can eat watermelon with gastric diseases should be judged according to the patient’s condition, common gastric diseases include acute and chronic gastroenteritis, gastric ulcer and so on. 1. Acute and chronic gastroenteritis: For patients with acute and chronic gastroenteritis, it is recommended to eat as little watermelon as possible. Watermelon is a cold fruit, easy to stimulate the smooth muscle of the gastrointestinal tract, gastrointestinal spasm. In addition, too much watermelon during gastroenteritis, easy to aggravate acute and chronic gastroenteritis due to abdominal pain, diarrhea and other symptoms. 2. Gastric ulcer: watermelon contains a large number of fructose components, easy to increase appetite, so that the patient to eat more at the same time to the gastrointestinal burden, not easy to digest and metabolize, but also to stimulate the gastric mucosa so that the secretion of gastric acid increased, aggravating the symptoms of patients. Suffer from stomach disease should be timely consultation, clear cause, under the guidance of the doctor for treatment.