There are many reasons why you always have blood in your stool: 1, it could be internal hemorrhoids. Internal hemorrhoids are varicose vein clusters, in the case of increased abdominal pressure or constipation, hemorrhoidal vein rupture and lead to bleeding.2, there may be anal fissure, such as dry stools lead to anal canal skin fissure, stool will stimulate the trauma and lead to fecal blood on the surface of feces.3, rectal polyps, rectal adenomas, because of the long-term stimulation of the stool, it will damage the mucous surface of the polyp and lead to blood vessel bleeding.4, there is also a cause of May be rectal malignant tumor, it will erode the rectal mucosa or submucosal blood vessels and lead to blood in the stool. Therefore, if there is always blood in the stool, you should perform rectal fingerprinting, and if necessary, perform anoscopy or colonoscopy to clarify its cause.