hydrotherapy is a system of colon cleansing commonly used by clinics and spas in Europe and the United States of America. Also known as colon irrigation, this treatment involves pumping sterile water into the anal canal in order to wash out its accumulated waste.  In this system, a gentle gravity-fed jet of water helps soften toxic deposits in the colon and allows patients to discharge waste matter in a slow and comfortable manner. This benign and stress-free process is repeated several times during each session.