Urine microalbumin is one of the most sensitive early diagnostic indicators of kidney function. When kidney function abnormalities occur in the early stage, urine microalbumin will be the first to appear in the urine and be detected. There is a certain limit to the degree of elevation. For minor elevation, or when the urine routine is rechecked and the urine microalbumin is found to be back to normal level, it is usually a transient elevation due to physiological factors, such as recent cold, fever, medication, strenuous exercise, cold stimulation, or violent emotional changes, which can cause this transient elevation of urine microalbumin. However, the elevated level is basically just above a certain range of the normal baseline. If the urine microalbumin continues to be at a high level and the body has uncomfortable symptoms, such as increased nocturia, weakness of the back and knees, as well as a recent decline in immunity and a tendency to catch a cold, these are early clinical signs of kidney insufficiency, so more detailed tests should be performed to clarify whether there are changes in kidney function.