Urine routine is an indicator of kidney disease, but not kidney function, which is an indicator of kidney disease in its late, advanced stage. The urine routine is an indicator of the presence of kidney disease, which is usually found in the physical examination. The urine routine mainly looks at the occult blood, proteinuria or red blood cells in the urine. If there are red blood cells or protein urine in urine, it means that the kidney may have disease. No matter what kind of kidney disease such as chronic glomerulonephritis, IgA glomerulonephritis including nephrotic syndrome, the kidney function is normal in the early stage, so the urine test is a manifestation to reflect whether the kidney has disease or not. Of course, proteinuria and occult blood do not completely indicate kidney disease. Clinically, if a problem is found in the urine, in most cases, the medical history and other tests are used to exclude other diseases other than kidney disease, resulting in transient urinary abnormalities, such as proteinuria and urinary occult blood. Therefore, urine routine mainly reflects whether there is any disease in the kidney, and what is the disease in the kidney may require further tests that do not reflect kidney function. Kidney function should be reflected by other aspects of blood tests such as urea nitrogen, creatinine, and renal excretion. Therefore, urine routine is a common indicator of physical examination, because there are more kidney diseases, and many early kidney diseases are not felt, and even no symptoms, so most kidney diseases are found in the process of physical examination, especially urine routine examination and testing. Therefore, it is recommended to have a physical examination once a year, and the staff should have a physical examination once a year, not just based on the feeling that there is no kidney disease. Some kidney disease early is symptomatic such as nephrotic syndrome will appear swelling, acute glomerulonephritis early may have symptoms of upper respiratory tract infection or infection elsewhere appear hematuria, such as some people if they have clinical medical knowledge to observe foam in the urine, will go to the hospital for routine urine examination laboratory tests. So urine routine in the physical examination is important, very meaningful, a key test to determine whether there is disease in the early kidney, although cheaper and simpler, but the significance of a great deal of guidance for health.