What causes high urea nitrogen?

High urea nitrogen may be physiological, eating too much high-protein food. It may also be pathological, such as abnormal renal function. In daily life, if overeating or eating high-protein food, it is easy to cause urea nitrogen to rise. If physiological factors are excluded, it is necessary to consider abnormal renal function, which can be determined by urinary system color Doppler ultrasound, blood routine, renal function, electrolyte examination and urine routine examination. If kidney function problems, need to take medicine to treat. Daily diet should be lighter, do not eat too much high-protein food.