Elevated urine microalbumin levels in diabetic patients suggest combined diabetic nephropathy. If urine microalbumin levels are in the range of 20-200ug/min, this suggests early diabetic nephropathy. If urine microalbumin >200ug/min or urine protein quantification appears 0.5g/24h, or urinalysis suggests urine protein (+), the results suggest clinical stage diabetic nephropathy. Whether it is early diabetic nephropathy or clinical stage nephropathy, active drug treatment should be taken. Besides using oral hypoglycemic drugs or insulin to control blood sugar, patients can take oral drugs to improve renal microcirculation and reduce urinary protein, like pancreatic kininogenase, Bering capsule or Huangkui capsule, which are all effective in treating renal disease.