Excessive drinking and urination
Excessive drinking and urination, or drinking and urinating more than normal, is medically called polyuria (poly = many; uria = urine) and polydipsia (poly = many; dipsia = drinking).
Thirst and urine production are a delicate balance controlled by interactions between the brain (hypothalamus and pituitary gland) and the kidneys. Increased urination stimulates thirst as the body's overall hydration decreases and stimulates thirst mechanisms in the brain. Sometimes the opposite can be true when excess thirst triggers urination as can be seen with diseases like diabetes when the body tries to dilute toxins by drinking more and the diluted blood then stimulates increased urination.