The most common signs of bad kidney are easy fatigue, poor sleep at night, easy waking, excessive dreaming, foam visible in urine and hematuria. If you have the above symptoms, it is recommended to go to the hospital further to find out the cause. In the hospital, we can further check liver function, blood routine, urine routine, kidney function, 24h urine protein quantification, urological ultrasound and renal dynamic imaging to clarify the kidney function and so on. If the kidney function is not good, we need to determine whether it is acute renal insufficiency or chronic renal insufficiency. Acute renal insufficiency is more recent nausea, vomiting, abdominal pain, diarrhea or hemorrhage caused by insufficient blood volume, or the application of nephrotoxic drugs, there will be a transient renal failure, most of which can be restored to normal through renal preservation treatment. If chronic renal function is poor, active long-term kidney preservation therapy is required.