It is normal to drink a lot of water and urinate a lot. Normal people should drink water 24 hours urine volume should be 1500-2500ml, a large amount of water will appear significantly increased urine volume, especially at night after 9 o’clock more water, there will be increased nocturnal urine phenomenon. If there is a 24-hour urine volume greater than 4000ml or more, it may be urolithiasis, it is recommended to further identify the cause, primary can be seen in kidney disease, can also be seen in pituitary system disease need to do cranial CT, to the endocrinology department and other related departments for treatment. Urine volume can reflect kidney disease, in acute renal failure there can be oliguric phase and polyuric phase, such as in chronic renal failure, urine volume is reduced or no urine, active treatment is recommended.