The red color of stool is usually considered in two ways, as follows: first, staining of pigment components in food or medications; second, bleeding in the digestive tract. If fruits such as red dragon fruit, tomatoes, watermelon and cherries are consumed, the stool color will be stained to varying degrees, or certain medications, such as rifampin capsules taken orally, the stool will be orange-red in color. This situation does not need to be treated, suspend the food or medication that may be related, and the stool can turn yellow or yellow-brown after 24-48 hours. However, it is important to pay attention to gastrointestinal bleeding, including upper and lower gastrointestinal bleeding. In cases of small, slow bleeding from the upper GI tract, the stools appear tarry. If red bloody stools appear, it may be a large amount of bleeding or lower GI bleeding, such as bleeding with hemorrhoids, anal fissure, colorectal cancer, etc., often accompanied by abdominal pain, acid reflux and other uncomfortable symptoms, and it is necessary to go to the hospital in time to further clarify the diagnosis and carry out systematic treatment.