| | Dental Health | Cavities How dirty is the rectum? The rectum contains feces, which is made up of undigested food, gut bacteria, and other waste products. Therefore, the rectum can be considered dirty. Cavities - Related Articles Crohn's & Celiac How to Use 20% Peroxide in Teeth Cleaning Types of Coude Catheters Nutritional Supplements & Amino Acids for Bipolar Disorder What is four different kinds of fracture? Age-Related Eye Disease How do you stop itching of scalp when coloring?