Hydrotherapy, or water therapy as it is also known centres around (as you’ve probably guessed) the use of water as a healing agent. The buoyancy, viscosity and mineral components of water are used through hydrotherapy to heal or relieve ills as varied as fatigue, sore throats, colds, inflammation of the joints, jaundice, rheumatism, arthritis, spondylitis, insomnia, soft tissue injuries and even diabetes.