What's wrong with little urination?

If the urine volume per day is less than 400 ml, this is oliguria. If it is less than 100 ml, this is anuria. This situation may be renal failure, and further examination of renal function should be performed to observe whether there is abnormal renal function. It is recommended that if there is little urination, pay attention to the daily amount of water, whether it is enough. If in a hot environment, or after a lot of exercise, drink a little water, urine volume will definitely decrease significantly. In this case, after drinking more water, eating a light diet, working and living in a cool environment, urine volume will increase significantly soon. If renal failure, it is recommended to go to the hospital in time for emergency treatment.