4. Diverticular Disease
Diverticular are the small pouches that protrude from the wall of the colon. These don’t usually cause any problems but if they become infected, they can then swell up and break causing the appearance of pink or tan blood in the stool. They might also in some cases begin to bleed and cause this same symptom with no infection, pain or discomfort.
Again, this type of lighter blood is usually not a sign that you need to worry but it is still always a good idea to check in with your doctor.