A fasting blood glucose of 7.6 mmol/L is above normal and is generally abnormal. If the patient does not have symptoms of diabetes, only once the fasting blood sugar is elevated, is not up to the diagnostic criteria of diabetes. The normal fasting blood glucose value of healthy people is between 3.9-6.1mmol/L fluctuation, and fasting blood glucose 7.6mmol/L has been significantly higher than the normal level. If the patient at the same time more drink, more food, more urine, weight loss, that is, “three more and one less” symptoms, can be under the guidance of the doctor, consider the diagnosis of diabetes mellitus. However, in serious illness or stress, there may be a transient increase in fasting blood glucose, but it is mostly temporary and self-limiting, and cannot be diagnosed as diabetes based on the fasting blood glucose value at this time, and it is necessary to review the test again after the elimination of the stress in order to clarify whether the patient is suffering from diabetes or not. If the diagnosis of diabetes mellitus is confirmed, it is necessary to go to the hospital, according to the sugar-lowering program formulated by the professional doctor to follow the doctor’s instructions for treatment, and in daily life you need to eat a low-sugar diet, appropriate exercise and so on.