The duration of diabetic nephropathy stage 3 may vary from person to person, some patients are very well controlled and maintained for a long time, they can have 3 or 5 years, some patients with poor blood sugar and blood pressure control and poor body management may reach stage 4 in a few months, so the duration of the disease depends on the patient’s condition. Some patients become to stage 4, or stage 3, edema is getting more and more serious, and need dialysis treatment, so naturally they become into stage 4. Therefore, diabetic nephropathy should be treated early to control various complications so as to protect the residual kidney function and avoid going to the next stage.