The causes of red stools can generally be divided into indigestion, gastrointestinal bleeding, hemorrhoids and other causes. 1, if the patient has indigestion, if he eats foods with more red pigments, such as watermelon, saints fruit, etc., which are not fully digested in the body and are excreted, it may cause the color of the stool to be red. 2, if there is a bleeding gastric ulcer or bleeding duodenal ulcer, etc., it will also cause the stool to appear dark red. 3, hemorrhoids also have a certain possibility to cause the color of the stool reddish, especially internal hemorrhoids. Therefore, it is advisable to pay attention to the presence of other symptoms once the redness of the stool occurs, and to go to the hospital for relevant examinations. If it is a gastrointestinal bleeding must be hospitalized, if the examination is red stool caused by hemorrhoids, you need to be promptly admitted to the hospital for surgery.