The first is to check the urine routine, because people with diabetes are at high risk of urinary tract infections, to see if there are high white blood cells and bacteria in the urine routine, and if there is a combination of urinary tract infections, the urine routine can be positive for nitrite. Second, you can check the urine renal function, including single urine renal function and 24-hour urine protein quantification, to see if there is diabetic nephropathy, early microproteinuria and massive proteinuria. Third, we can check the specific gravity of urine, including the osmolality of urine, to see if there are possible hypothalamic and pituitary changes, resulting in hypotonic urine and low specific gravity urine. Fourth, you can look at the ketone bodies in the blood and urine. If a person with diabetes has poor blood sugar control, diabetic ketosis can occur. Fifth, if the blood sugar is not well controlled, glucose can appear in the urine, which is expressed as urine sugar is positive.