Contraindications to colon hydrotherapy machines. home colonic irrigation kit with non-invasive physical hydrotherapy method, so there are no side effects, but some users may experience the following symptoms Digestive upset and mild diarrhea. *Acute abdominal symptoms. *Gastrointestinal bleeding (including blood in stool). * Intestinal perforation. *Colorectal cancer. *Anal, rectal infections. * Less than six months after anorectal, rectal, or colorectal …