Colon cleansing, also known as colon therapy, colon hydrotherapy, a colonic, or colonic irrigation, encompasses a number of alternative medical therapies claimed to remove toxins from the colon and intestinal tract by removing accumulations of feces. Colon cleansing in this context should not be confused with an enema which introduces fluid into the colon, often under mainstream medical supervision, for a limited number of purposes including severe constipation and medical imaging.