Colon cleansing with water can be unsafe, as the process can cause perforated bowels, electrolyte imbalances, and increased infection and dehydration risks, according to Mayo Clinic. Other side effects include bloating, nausea and vomiting. Heart, kidney, colitis and Crohn’s disease patients are especially at risk, notes Cleveland Clinic.
Patients who choose to undergo colon cleansing with water should ensure their therapists utilize new, disposable equipment, notes Mayo Clinic. Drinking plenty of water helps to prevent dehydration. While doctors typically use colon cleanses to prepare patients for colonoscopies, the body does not need colon cleanses to detoxify itself. The bowel and digestive system remove the body's bacteria and waste material naturally.