Whether or not urine microalbumin 200mg/L is serious should be judged according to the cause of its elevation, physiological causes are usually not serious, while pathological causes are relatively serious. In normal people, urine microalbumin is less than 30mg/L in random urine and less than 300mg/24h in 24-hour urine. physiological causes such as strenuous exercise can lead to its elevation, and it will usually return to normal gradually after rest, which is usually not serious. Pathologic causes such as diabetic nephropathy, hypertensive nephropathy, urinary tract infection, primary glomerulonephritis and other causes of elevated urine microalbumin are usually more serious. It is recommended that patients with elevated urinary microalbumin should go to the hospital in time, complete the relevant examinations under the guidance of the doctor, and if it is caused by pathological factors, it should be actively treated to avoid the development of the disease.