Dark red stool may be related to diet, intestinal diseases, stomach diseases and other reasons. 1. Diet: If you eat some foods rich in pigment such as dragon fruit, you may have dark red stools. 2. Intestinal diseases: such as ulcerative colitis, Crohn’s disease and other mucosal erosion, bleeding, may lead to dark red stools. 3. Gastric diseases: such as gastric ulcers due to the expansion of the ulcer surface to the mucosal blood vessels can lead to bleeding, if the bleeding is relatively large, can make the stool dark red. It is recommended that people with dark red stools who are accompanied by other uncomfortable symptoms should go to the hospital in a timely manner, to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor, so as to avoid delaying the condition.