Urine microalbumin 540mg/L in nephropathy test is considered clinical proteinuria, and the severity should be judged according to the cause of urinary protein. Physiologic is usually not serious, and pathologic is usually relatively serious. Under normal circumstances, the value of urine microalbumin does not exceed 30mg/L. Physiological conditions, such as strenuous exercise and other reasons can lead to elevated urinary protein, usually after rest can return to normal, usually not serious. Pathological conditions, such as acute and chronic glomerulonephritis, pyelonephritis and other kidney diseases lead to elevated urine protein, usually relatively serious. In the clinical urine microalbumin 540mg / L patients, should promptly go to the hospital, under the guidance of the doctor to improve the relevant examinations, such as renal function, urinalysis, urinary ultrasound, etc., such as for pathological factors, should be actively treated to avoid delaying the condition.