Routine indicators for evaluating renal function include blood biochemical tests, urine tests and imaging tests of the kidneys. Blood biochemical tests for evaluating kidney function include urea nitrogen, uric acid, blood creatinine and cystatin C, which are the most commonly used indicators for evaluating kidney function. If the blood creatinine, urea nitrogen or cystatin level increases, it suggests that the kidney function is impaired. However, the glomerular filtration rate estimated from blood creatinine and other indicators is more commonly used in clinical practice. Urine screening tests to evaluate renal function include: 12-hour water-restricted urine osmolality, urinary alpha 1-microglobulin, urinary retinol-binding protein, etc., which can evaluate whether renal tubular function is impaired. A decrease in urine osmolality with 12 hours of water fasting suggests distal tubular concentrating dysfunction; an increase in urinary α1-microglobulin or retinol-binding protein suggests proximal tubular reabsorption dysfunction. Imaging tests of the kidneys, such as ECT of both kidneys and nuclear medicine examination, can understand the glomerular filtration rate. If the patient has any discomfort, it is recommended to go to a regular hospital in time, under the guidance of the physician to standardize the examination and treatment.