When created in non-volcanic areas, water becomes heated as it comes into contact with hot rocks within the earth's crust. Then the water will rise back up to create hot springs. The volcanic activity responsible for creating the hot springs<span> are caused by the moving </span>hot<span> spot, which is currently under </span>Yellowstone<span>. </span> As for your second question,
Balneology is the practice of treating and preventing disease through the use of natural mineral hot springs<span> water. That's a use of hot springs.</span>
Volcanoes. It is an impressive sight: two sides of land so visibly ripped apart. The Mid-Atlantic Ridge that is to blame runs through the whole of Iceland