If the fasting blood sugar has reached 10mmol/L, it is already a serious situation and can be diagnosed as diabetes; if the postprandial blood sugar is at 10mmol/L, it has not reached the level of diabetes, but only pre-diabetes. The diagnostic criteria for diabetes are fasting blood glucose >7.0mmol/L and 2h postprandial blood glucose >11.1mmol/L. The blood glucose referred to here is the blood glucose from a venous blood draw, not the blood glucose from finger blood. If fasting blood glucose has reached 10mmol/L, then the diagnosis of diabetes is clear, and this level of hyperglycemia needs to be treated with medication or insulin injection. If the fasting blood glucose is 10mmol/L, then the current treatment plan is not very effective in lowering blood glucose, and it is necessary to change the treatment plan or use insulin to lower blood glucose.