It is well known that when blood sugar is high, it is usually combined with an increase in urine sugar, but an increase in blood sugar and an increase in urine sugar do not always match. Sometimes the measured blood glucose is normal, but the urine sugar is positive, you can do ambulatory blood glucose monitoring, because the blood glucose is measured at each time point, not the whole day, and it is very possible that there is no monitored blood glucose increase. If the blood glucose is normal after monitoring, but the urine sugar is still high, there are two cases: 1, the lowering of renal sugar threshold, the general renal sugar threshold is about between 7.8-8.0mmol/L, when the blood glucose is greater than this time, only then there will be sugar excreted through the kidneys, some people’s renal sugar threshold is lowered, 5mmol/L or 6mmol/L, there will also be urine sugar excretion, this case does not need 2, the application of Dagliotoxin can promote the kidney sugar excretion, so as to achieve the purpose of reducing sugar, urinary sugar increased to the hospital to check, some need to deal with, some do not need to deal with.