Hydrotherapy is the use of water in the treatment of disease/illness. Hydrothermal therapy additionally uses its temperature effects, as in hot sauna bath, wraps, etc. Water also has a hydrostatic effect. It has a massage-like feeling as the water gently kneads your body. Water, in motion, stimulates touch receptors on the skin, boosting blood circulation and releasing tight muscles.

Hydrotherapy and hydrothermal therapy are chiefly used to tone up the body, to stimulate digestion, the circulation, and the immune system, and to bring relief from pain.