Clinically normal blood glucose and diabetes are common in renal diabetes, but fasting blood glucose and glucose tolerance test results are normal in renal diabetes, which can be differentially diagnosed. The following is to say that these will also appear glycemic normal glycosuria of the situation. 1, Fanconi syndrome: due to low renal tubular reabsorption of glucose, which is congenital, clinically known as familial renal diabetes. Generally these patients appear diabetic and fasting blood sugar, glucose tolerance test are normal, but only urine sugar is high, need to pay attention to the identification of. 2, neonatal diabetes: this is mainly due to the newborn’s renal tubular function is not perfect, so there will be a certain period of diabetes, as the child grows, slowly urine sugar will disappear. 3, chronic nephritis nephrotic syndrome: this is mainly due to poor kidney function, which leads to the occurrence of acquired renal diabetes. 4, late pregnancy and lactating women: due to pregnancy-induced endocrine changes, hormonal abnormalities caused by the emergence of diabetes may be related to increased glomerular filtration rate. Generally after this time period, it will recover. But also pay attention to the occurrence of diabetes.