The early symptoms of diabetic nephropathy are as follows: 1. Diabetic symptoms: drinking more water, eating more, and losing weight; 2. Nephropathy symptoms: clinical manifestations include patients with bilateral lower limb edema, cloudy urine, and examination at the hospital can find protein in the urine, and less often hematuria. If the doctor finds edema, he can do an examination. Patients with vision problems can go to the ophthalmology examination, which can find large changes in the blood vessels of the fundus. So clinically, there are mainly clinical symptoms of diabetes, edema symptoms, and abnormal urine. Remind diabetic patients that they must pay attention to edema and urine abnormalities and go to the hospital for examination as soon as possible to detect the presence of diabetic nephropathy at an early stage.