6. Rectal bleeding
It is not a common symptom of this condition. Even so, sometimes those affected can present blood after defecation when cleaned with toilet paper or directly in the stool, which may have red, black or tarry-looking feces. Its color indicates the height of bleeding within the digestive system.
Stools with intense red color is a consequence of anal pathologies, such as hemorrhoids or a fistula, while a darker color in the stool indicates the presence of bleeding ulcers in the walls of the colon or small intestine.