It could be something as simple as internal hemorrhoids or as serious as cancer. Never mess around with this type of a symptom. See your doctor to rule out anything of a serious nature and always remember that if it is something serious it is almost 100% curable if caught early ,so the key is to be checked by your doctor and do not self diagnose anytime blood is involved. That could be precious time wasted.
Lizz, anytime blood is found in the fecal material the issue should be checked out with a doctor. Call and make an appointment.