Some alternative medicine clinics use colonic irrigation, or high enemas, to cleanse the bowel. They claim it helps cure cancer. Our bodies contain more water than any other substance. We are, in fact, mostly water, and we need water to survive. Cities throughout the world give a high priority to providing clean, safe drinking water for their citizens.
Many cities add fluoride to the public water supply to help protect teeth from decay.
Other chemicals are added to kill germs and bacteria. Many types of hydrotherapy are used in mainstream medicine. That is, they have been proven valuable in treating various accidents, illness, and disease. External hydrotherapies are useful medical treatments. Hot compresses to relieve pain after swelling goes down.