Colon cleansing (colon therapy) encompasses a number of alternative medical therapies intended to remove fecal waste and unidentified toxins from the colon and intestinal tract. Colon cleansing may take the form of colon hydrotherapy (also called colonics or colonic irrigation) or oral cleansing regimens.

Colon hydrotherapy uses enemas to inject water, sometimes mixed with herbs, or other liquids, into the colon using special equipment. Oral cleaning uses dietary fiber, herbs, dietary supplements or laxatives.