What causes urea to drop?

The decrease of urea nitrogen may be related to diet, or it may be due to poor renal function. First, if the diet is low in protein, drinking a lot of water can cause the decrease of urea; second, renal function is not good, such as blood creatinine and urea nitrogen can be increased, creatinine and urea nitrogen represent the level of small molecular toxins in the body; third, urea nitrogen is not only an indicator of renal function, but also an indicator of nutrition. Patients with chronic liver disease can also cause low urea nitrogen. In this case, to improve the diet to increase protein intake, blood urea will rise; if there is kidney disease patients, to timely oral kidney medicine treatment.