Eating watermelon after the stool may become red, too much watermelon, watermelon is not fully digested, in the intestinal tract to stay more, watermelon contains some pigment substances called lycopene and carotene, if eating too much undigested watermelon, will lead to a change in the color of the stool, is a normal phenomenon, don’t worry about it too much. This is normal and should not be a cause for concern. The color of your stool will gradually return to normal after you stop eating. However, if the stool continues to be red, it is necessary to exclude digestive diseases or anorectal diseases, it is recommended to timely gastroenterology, gastroenteroscopy, if necessary, in order to clarify the cause of the symptomatic treatment. Although watermelon can quench the thirst, but it is a cold fruit, for the weak spleen and stomach, gastrointestinal function of the crowd, it is recommended to eat a small amount, so as not to cause abdominal pain, diarrhea and other symptoms.