Blood in the stool is bright red and painless, and can be seen in the following diseases: 1. Internal hemorrhoids, which are often accompanied by a feeling of anal swelling, and the blood in the stool usually appears as dripping blood after relieving the stool, or blood on the hand paper. 3. systemic coagulation disorders, which are usually accompanied by petechial hemorrhage, petechiae or bleeding gums, and require a coagulation test in the haematology department.