Intestinal polyps may bleed, but usually only a small amount of blood in the stool, and less frequently a large amount of bleeding is seen. Intestinal polyps are abnormal growths that protrude from the mucosal surface of the intestine into the intestinal lumen and are collectively referred to as polyps until the nature of the pathology is determined, usually benign lesions, but may develop into malignant tumors. Intestinal polyps may be caused by chronic inflammatory irritation or may be caused by genetic influences. In the early stage when the polyp is small, the patient may have no obvious symptoms and no bleeding, but as the polyp gradually increases in size or induces infection, it is more likely to cause a small amount of bleeding under the stimulation of dry and hard stools or foreign bodies in the intestine, which may manifest as blood in the stool. Small amounts of bleeding may also occur if a polyp becomes eroded or ulcerated, and there is usually no significant bleeding at this time. If a large amount of bleeding occurs, it is considered to be caused by malignant lesions. Malignant tumors of the intestine can cause invasion of the surrounding blood vessels and mucous membrane, which may result in more bleeding after the rupture of blood vessels.