Elevated urine protein in diabetes suggests the possibility of diabetic nephropathy. Diabetes mellitus with a duration of more than 10 years and poor glycemic control may present with diabetic nephropathy, which manifests as elevated urinary protein. As the nephropathy progresses, more and more protein leaks out of the kidneys. There is more and more protein in the urine, and a urine protein (+) or (++) can be seen in the urine routine, which is called positive urine protein. So if a diabetic patient has positive protein in the urine routine, it often indicates that diabetic nephropathy has developed. However, there are many other causes of elevated urine protein, and other causes of kidney disease should be ruled out before diagnosing diabetic nephropathy, so if the urine is positive for protein, you should go to the hospital as soon as possible for evaluation.