If the patient’s digestive ability is weak, after eating dragon fruit three days after defecation red is generally a normal phenomenon, if there is digestive bleeding, after eating dragon fruit three days after defecation red is an abnormal phenomenon. Dragon fruit contains a lot of red pigment, if the natural pigment is not fully absorbed decomposition will lead to red stool, if the digestive capacity is weak, pigment absorption decomposition is slow, after eating dragon fruit three days after defecation red is a normal phenomenon, if there is a digestive tract bleeding, will lead to defecation with blood, after eating dragon fruit three days after defecation red is an abnormal phenomenon. If there is a weak digestive ability, should pay attention to avoid excessive consumption of dragon fruit and after meals to eat dragon fruit, to prevent diarrhea, if there is digestive bleeding, should be under the guidance of a doctor to take lansoprazole, omeprazole and other drugs, can inhibit the secretion of gastric acid, to play a role in stopping the bleeding, allergic to the drug is prohibited. It is recommended that patients should go to the hospital in time for examination and always pay attention to the health condition.