List of diseases that include blood in stool as a symptom. Any major, well-known medical conditions associated with blood in stool are included below, listed alphabetically with photos when available. Any maladies, sicknesses or illnesses with blood in stool as a symptom can be seen below. For any real, further diagnosis of something you feel you might have, please consult a doctor. This list includes information about each disease, such as what risks are associated with it. This list is made up of a variety of illnesses, including Peptic ulcer and Dysentery.This list answers the questions, "What risks are associated with blood in stool?" and "What disease can I have if I have blood in stool?"