High urine microalbumin may be caused by physiological reasons such as fever and strenuous exercise, or by pathological reasons such as glomerulonephritis and urinary tract infection. 1. Physiological reasons: excessive consumption of high-protein foods, strenuous exercise, fever and other reasons may cause high urine microalbumin. Usually there is no need for special treatment, after rest, the urine protein can usually turn negative on its own. 2. Pathologic causes: (1) Glomerulonephritis: may affect the filtration function of the kidney, there are protein molecules into the urine, which can lead to increased protein content in the urine, urine test appears microalbumin high. (2) Urinary tract infection: such as cystitis or pyelonephritis, after the infection is aggravated, it may lead to the presence of protein in the urine and high microalbumin. Urine microalbumin high may also have other reasons, it is recommended that patients go to the regular hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to targeted treatment or treatment.