What causes high urine concentrations?

The most common reasons for the increase in urine concentration are physiological reasons and pathological factors. The physiological reasons are mainly found in too little drinking water or excessive sweating caused by intense exercise. The pathological factors are found in shock caused by massive blood loss. The decrease in urine secretion by the kidney will also cause the increase in drug concentration. Secondly, the decline of visceral function shows renal failure. In this case, it will also cause the increase of urine concentration. There are many reasons for the increase of urine concentration, which need to be analyzed in combination with the specific situation of the patient.