Urine microprotein measurement of less than 40mg for 24 hours is considered normal. If it exceeds this range, it indicates the presence of pathological proteinuria, which needs to be determined based on the test results, as well as the patient’s renal function and urological ultrasound. It is also necessary to further check the patient’s complement series and autoimmune series to rule out the presence of related immune nephritis changes. Increased protein content in the urine can occur after kidney damage, such as glomerular damage can lead to increased protein leakage and large amounts of proteinuria. Diseases of the renal tubules can present with increased protein leakage, but the 24-hour quantification is less than 2 g. If there is some post-renal obstruction disease, or drug-related kidney damage, or a high protein diet, which can cause proteinuria to varying degrees, quantitative urine protein testing and related renal function tests are needed to determine whether further treatment is needed, or to continue observation, etc.