Hydrotherapy showers relax muscles, increase hormonal function and alleviate pain, according to the University of New Hampshire. Hydrotherapy showers also support the immune system and stimulate blood supply to the internal organs, helping them to function more efficiently.
Cold water hydrotherapy constricts blood vessels and restricts blood flow, which helps to reduce inflammation, states the University of New Hampshire. Exposure to hot water increases body temperature and blood flow, which helps to encourage healing of muscle and tissue injuries, as noted by Health and Fitness Travel. Physical therapists often alternate between applying hot and cold hydrotherapy treatments to produce the best results for their patients.
Hydrotherapy stimulates the body to produce endorphins, which act as a natural pain reliever and help to improve mental and physical well-being. By relieving stress, hydrotherapy can help to lower blood pressure, according to Health and Fitness Travel. Additionally, hydrotherapy stimulates the lymphatic system and strengthens the body's immune response, encouraging faster healing from colds and illnesses.
Hydrotherapy showers are only one form of hydrotherapy; others include saunas, pools, thermal baths, water circuits and steam rooms, notes Health and Fitness Travel. Each form of hydrotherapy has specific benefits. Modern alternative medicine practitioners often combine hydrotherapy with aroma therapy and massage therapy in a spa setting.