Fasting blood glucose 6.2, or fasting blood glucose 6.2 mmol/L, is not normal. The normal standard of fasting blood sugar should be less than 6.1mmol/L, more than that is fasting hyperglycemia. It may be physiological or pathological, as follows: 1. Physiological: If you have eaten too many sugary drinks or stayed up all night or worked hard the day before the examination. It may cause a transient increase in blood glucose, which is normal and no need to worry too much. 2. Pathological: If fasting blood glucose is 6.2mmol/L, patients need to further improve the measurement of two-hour postprandial blood glucose. If the two-hour postprandial blood glucose ≥ 11.1mmol / L, if accompanied by the typical symptoms of diabetes, is considered to be diabetes, need to consult a doctor in a timely manner to treat, comply with the doctor’s instructions for medication, and at the same time through the diet and exercise to control blood glucose. It is recommended that patients with blood glucose above the normal range should go to the endocrinology department of a regular hospital for consultation and treatment as prescribed.