Hydrotherapy relies on its mechanical and thermal effects, in order to induce healing. It takes advantage of the body’s reaction to cold or hot stimuli, the pressure exerted by water, the protracted application of heat as well as the sensation of the water. These sensations and effects are then carried deeper into the skin by nerves. 

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When this happens, these sensations stimulate the immune system, thus influencing the release of stress hormones, while improving digestion, circulation and blood flow, as well as reducing the body’s sensitivity to pain.