Drinking too much water and urinating too little may be related to physiological factors such as sweating or lack of water in the body, and may also be related to renal vascular lesions, glomerulopathy, as well as other diseases such as urinary tract obstruction. 1. Physiological factors: usually sweat more, excessive water loss in the body will cause more water and less urine, is a normal physiological phenomenon, no need to worry too much, moderate amount of water can be supplemented. 2. Renal vascular lesions: renal vascular lesions are common in renal vascular stenosis or inflammation, nephrotic syndrome, lupus nephritis, long-term bedridden renal artery embolism or thrombosis, etc., which will lead to renal metabolism is affected, and then appear to drink a lot of water and urinate less. 3. Glomerulopathy: If there are acute glomerulonephritis, chronic glomerulonephritis, and other secondary glomerulopathy, it may lead to a decrease in glomerular filtration rate, which will lead to the situation of drinking more water and urinating less. 4. Other diseases: stones, blood clots, necrotic tissue and other obstruction of the ureter as well as the bladder inlet and outlet or the posterior urethra, causing urinary tract obstruction, which can lead to less urine, appearing to drink a lot of water but less urine. Normal adult 24-hour urine volume is 1000 to 2000 ml. If the 24-hour urine volume is less than 400 ml, it is called oliguria. Therefore, when there is less urine, you should go to the hospital in time to avoid delaying the condition.