Blood in stool

Blood in stool is a symptom of a wide range of medical conditions, from minor to serious. It can appear as bright red blood, black or tarry stools, or blood mixed in with the stool. It can be caused by something as simple as hemorrhoids or as serious as cancer. It usually develops over time and can range from mild to severe. Symptoms can vary depending on the cause, but can include abdominal pain, diarrhea, constipation, weight loss, fever, and fatigue.