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. Whirlpool baths to rehabilitate injured muscles. Humidifier steam to reduce the discomfort of sore throats, colds, and other respiratory problems. Sitzbaths, often with Epsom salts, to treat problems of the pelvic area. Exercising in a swimming pool lowers the risk of bone or muscle injury.