Diabetics checking urine microalbumin are required to do so on an empty stomach and usually cannot drink water. Diabetic patients checking urine microalbumin usually want to check the amount of albumin in the urine, which is used to know whether there is diabetic nephropathy and the severity of diabetic nephropathy. Under normal circumstances, urine protein should be negative. If urine protein increases, it suggests that there may be damage to the kidneys and further treatment should be given. Check urine microalbumin test should be fasting, require fasting water within 8 to 10 hours before the test, early dry mouth can not drink water, otherwise it may affect the accuracy of the test results, resulting in inaccurate results, affecting the judgment of the disease. Avoid strenuous exercise the day before the test, and women try to avoid the menstrual period. Diabetics checking microalbumin should be examined under the guidance of a doctor, and any abnormalities should be consulted promptly.