Eating watermelon will pull red like blood stool, may be a normal physiological phenomenon, may also be due to gastrointestinal bleeding. Watermelon is rich in lycopene, carotene and other red pigment substances, if you eat too much at once, the gastrointestinal tract can not be fully absorbed, it may be discharged with the stool, resulting in red stools, or even like blood, which is usually a physiological phenomenon, the patient’s stool is generally normal in shape, and will not be obviously uncomfortable, generally in the stop eating will gradually return to normal. However, if the patient patient stool thin, or with mucus, or patients with abdominal pain, pain during defecation, diarrhea and other discomforts, need to consider disease factors caused by gastrointestinal bleeding, such as hemorrhoids, anal fissure, inflammatory bowel disease, rectal cancer, colon cancer, etc., may lead to the patient to eat watermelon after pulling the red like blood in the stool. If patients eat watermelon a few days after the stool is still red, or accompanied by obvious discomfort, it is recommended to consult a doctor in a timely manner, to identify the cause of the disease, targeted treatment, so as not to delay the condition.