Fasting blood glucose 3.9~6.1 mmol/L in healthy people, two hours after meal blood glucose <7.8 mmol/L. The patient's fasting blood glucose 7.4 mmol/L belongs to elevated blood glucose. It may be caused by stress, diabetes and other factors, generally through diet, exercise therapy and medication can control blood glucose in the normal range, simple exercise exercise may not be restored. 1. Infection, stress: Acute infection, trauma or other stressful situations can appear temporary elevation of blood glucose, can not diagnose diabetes with the blood glucose value at this time, must be reviewed after the elimination of stress, and then determine the state of glucose metabolism. Active treatment of the primary disease can restore blood sugar to normal. 2. Diabetes mellitus: If the patient's fasting blood glucose is greater than or equal to 7.0mmol/L, accompanied by symptoms such as drinking, eating, urinating and weight loss, it is considered diabetes mellitus, and the patient's blood glucose can be restored to the normal range by following the doctor's instructions, through diet and exercise therapy and drug treatment. It is recommended that patients find abnormal blood glucose values and go to the hospital in time.