Hydrotherapy is the use of water with different ingredients, temperature, pressure or in different modalities to treat a disease or maintain health. Its functions cover clamming, hypnotizing, sweating, diuresis, anti-inflammation, pain relief, accelerating metabolism, etc.

As for urinary system, cold stimulation of hydrotherapy can reduce sweating and improve urination; while heat stimulation benefits kidney vessels to expand so as to attain diuretic effect increasing excretion of sodium salt and urea.

It is helpful to treat many illnesses and conditions, including depression, headaches, sleep disorders, arthritis, diabetes, hypertension, gout, joint, muscle and nerve problems, menstrual cramps, etc.