After eating dragon fruit defecation for red may be a normal phenomenon, also does not exclude is digestive bleeding (intestinal polyps, enteritis, colon cancer, etc.). 1. Normal phenomenon: red dragon fruit contains high anthocyanin, after eating dragon fruit, the human body can not completely dissolve and absorb this pigment, so the stool is red stop eating dragon fruit can return to normal, do not need treatment. 2. Gastrointestinal bleeding: If the stool discharged after stopping eating dragon fruit is still red, consider the following factors: (1) Intestinal polyps: the stool is dry and the mucous membrane on the surface of the polyp is rubbed by the feces, so the stool is red. (2) Enteritis: Infection by pathogenic bacteria leads to damage of intestinal mucous membrane and exudation of blood, which causes red stool, diarrhea, abdominal pain and other symptoms. (3) Colorectal cancer: infiltration of cancer cells into local tissues may cause red stool, change of fecal character, emaciation, anemia and other symptoms. If the feces is red after eating dragon fruit, and if the feces is still red after stopping eating dragon fruit, it is recommended to consult a doctor in time and follow the doctor’s prescription.