Diabetes itself is not staged, but only when there are diabetes-related complications, there is a corresponding stage. The staging of complications is relatively mild in stage I, and gradually becomes more and more severe in stages II and III upwards, so if a patient has stage III diabetes, it suggests that the patient has combined diabetes complications and they are relatively severe. Diabetic nephropathy and diabetic retinopathy generally have specific stages, diabetic nephropathy is mainly divided into five stages, so the third stage belongs to the intermediate stage, the patient check urine microalbumin significantly elevated, but blood pressure can be normal or high. Patients are advised to eat less soy-based food, to eat high-quality protein, and the amount of protein intake should not be too much, to regularly recheck urine protein, to control blood sugar, blood pressure and lipids within a more normal range, otherwise further progress may require renal dialysis treatment. If there is diabetic retinopathy stage III, patients will have blurred vision and need to visit the ophthalmology department in time to assess the condition of the fundus and further decide on the treatment plan so that the progression does not aggravate and affect the vision causing blindness.