Drinking a lot of water and urinating little is caused by more loss, kidney concentration and so on.
1. Loss of more: such as sweating evaporation in hot weather; diarrhea through the gastrointestinal tract loss; due to bacterial infections caused by fever caused by the loss of fluids, will appear to drink a lot of water but not a lot of urine, it is recommended to timely replenishment of water, and if necessary, need to be supplemented through the intravenous infusion of fluids.
2. Renal concentration: If the body has low blood pressure or insufficient perfusion, the kidneys will play the concentration function, the water will be drunk to concentrate and dilute to maintain the body perfusion and blood pressure, to maintain the body’s normal metabolism, then there will be an appeal.
There may be other reasons for the low urine output when you drink a lot of water, so it is recommended to actively seek medical advice and treatment under the guidance of a professional doctor.