Constitutional hydrotherapy has been used in Nature Cure to affect the immune, nervous, and gastrointestinal systems. The application of hot and cold towels to the chest, abdomen, and back provide a pumping action to the circulatory and lymphatic systems. Fresh blood, nutrients, and oxygen travel to the vital organs; excess fluids and toxins are shunted to the kidneys, liver, and lungs; and the gastrointestinal tract is gently stimulated. This is the time of year when I start to see folks coming in overworked, stressed out, worn-down, and fighting whatever bug is going around the workplace and schools. Hydrotherapy is one of the best ways to combat the bugs when you're working many hours and need to take a time out to optimize your health. I usually see patients once every week or two during the cold and flu season for optimal immune stimulation and illness prevention.
For a little more info about hydrotherapy, check out this study happening at the Helfgott Research Institute.