Hemorrhoids can sometimes cause bleeding in the stool. Hemorrhoids are varicose veins that are divided into internal and external hemorrhoids, and external hemorrhoids are divided into connective tissue external hemorrhoids, inflammatory external hemorrhoids, and thrombosed external hemorrhoids. The symptoms of connective tissue external hemorrhoids and inflammatory external hemorrhoids are generally mild, no blood in the stool and no pain, and generally do not cause bleeding in the stool. In the case of thrombosed external hemorrhoids, they can cause pain around the anus due to venous blood pooling and rarely cause bleeding. Internal hemorrhoids usually cause bleeding, and its symptoms are mainly painless progressive bleeding in the form of dripping or spraying. Internal hemorrhoids are located above the dentate line, and when stimulated by increased abdominal pressure or stool, the nucleus of the hemorrhoid can easily rupture and cause bleeding. Therefore, if you have internal hemorrhoids, you may have blood in your stool, while external hemorrhoids usually do not have blood.