There is no specific grading of diabetes, but fasting blood glucose 21mmol/L is a more serious state, and requires timely treatment, including medication, general treatment and so on.
Diagnostic criteria for diabetes mellitus are: if there are typical “three more and one less” symptoms of diabetes mellitus, meet the fasting blood glucose 7 ≥ mmol/l, or 2 hours after meal blood glucose ≥ 11.1 mmol/l, or random blood glucose ≥ 11.1 mmol/l, or glycated hemoglobin ≥ 6.5% of any of them can be diagnosed as diabetes mellitus.
If there are no symptoms of diabetes, two plasma glucose events meeting the above criteria are required to confirm the diagnosis.
Normal fasting blood glucose is between 3.9~6.1mmol/L, fasting blood glucose 21mmol/L belongs to a more serious situation, but clinically there is no classification of diabetes, so there is no way to know how many grades of diabetes fasting blood glucose 21mmol/L is.
Fasting blood glucose 21mmol / L far beyond the normal range, indicating that the patient is in a more serious blood sugar state, may appear diabetic ketoacidosis, hyperosmolar coma and other acute complications of diabetes mellitus, need to be immediately to the hospital and active treatment.
For those with fasting blood glucose of 21mmol/L, they should be treated in a timely manner to avoid delays.