What causes less urine?

Normal people 24 hours of urine in 1500-2000 ml, if the daily urine volume is less than 500 ml, this time can be called urine output less. First of all, to consider is urinary tract obstruction, urinary stones caused, such as prostate hyperplasia will press the urethra, causing urine can not be discharged normally, then the patient will show oliguria, frequent urination phenomenon. If the kidney is suffering from acute trauma, it will cause hemorrhagic shock, severe dehydration, etc. It will also cause oliguria. It is also related to the disease of the kidney itself, such as kidney tumor, renal tuberculosis, renal failure, uremia, etc. Secondly, it is physiological reasons, that is, drinking too little water, because urine volume is produced by the body's water, and drinking less natural urine volume will also decrease. When the human body is in a high temperature environment for a long time, even if it drinks a lot of water at this time, it will show less urine after a large amount of sweat is excreted.