1.Increased foam or swelling in the urine is found, and urine protein can be checked. 2.It is better to use the first bubble of urine after waking up in the morning to check more accurately, and the examination of any urine can also find the problem. 3.The first bubble of urine after waking up in the morning can be checked for urinary routine and urine protein creatinine ratio. 4.If urine routine or urine protein creatinine ratio is abnormal, 24-hour urine protein quantification needs to be checked. 5, 24-hour urine retention method: prepare a clean container, the first bubble of urine in the morning of the day of retention discarded, starting with the second bubble of urine, after which all urine is left in the same container, until the first bubble of urine the next morning is also left in the container. The retained urine is mixed and the total urine volume is measured with a measuring cup and recorded on the examination sheet. Remove a tube of urine from the container and send it for testing. 6.If the presence of proteinuria is determined, further urine protein electrophoresis and early kidney damage indicator tests can be done to help determine the source of protein in the urine. 7, If proteinuria is found, dynamic monitoring is also needed to check several times to determine whether the proteinuria is persistent or transient. Persistent proteinuria often has pathologic significance.