The more common factors that cause the body to consume more water and urinate less are high ambient temperatures, the habit of breathing with the mouth open, and the unobtrusive loss of water by evaporation from the skin and mucous membranes. In pathological conditions, such as when the body has kidney insufficiency, the kidneys are unable to filter enough water to form urine after intake. There are also causes caused by urinary obstruction, such as having ureteral stenosis or urethral stricture. In addition, if an elderly man has prostate enlargement or a neurogenic bladder, so that urine is only stored in the bladder, the bladder can not contract on its own and the body can not observe enough urine discharge, these problems should be examined to clarify, clear and then carry out targeted treatment, regular drinking water after the urine is less mainly caused by human dehydration or more water loss.