Renal insufficiency azotemia generally refers to chronic renal insufficiency in the decompensated stage, and its diagnostic criteria are: endogenous creatinine clearance (Ccr) 50-20mL/min, blood urea nitrogen (BUN) 9-20mmol/L, blood creatinine (Scr) 178-442μmol/L. Endogenous creatinine clearance, i.e., glomerular filtration rate, blood creatinine, and urea nitrogen are important indicators of renal function, and azotemia should be considered if these indicators are observed to exceed a certain level during renal function tests. The emergence of azotemia is mostly induced by the reduced detoxification function of the kidneys. Renal insufficiency has a greater danger, the occurrence of renal insufficiency, it is recommended to consult a doctor in a timely manner, under the guidance of the physician active treatment.