Fasting blood glucose 8.7mmol / L should be timely to the hospital, under the guidance of the physician reasonable diet and exercise, oral hypoglycemic therapy if necessary, such as stress, hyperthyroidism and other causes of elevated blood glucose, it is recommended that the treatment of primary disease. The normal range of fasting blood glucose should be 3.9~6.1mmol/L, 8.7mmol/L suggests elevated blood glucose, if two consecutive measurements of fasting blood glucose are more than 6.1mmol/L, it can be diagnosed as type 2 diabetes mellitus, and should be under the guidance of the physician to take oral metformin, acarbose, or gliclazide glucose-lowering drugs, with dietary control and exercise. Stress, hyperthyroidism, taking corticosteroids and other reasons may also lead to elevated blood glucose, may be transient elevation of blood glucose, it is recommended to repeat several times the blood glucose and monitoring of blood glucose 2 hours after meals, clear blood glucose situation, and at the same time the treatment of primary diseases, dietary control and strengthen the exercise, if through the above methods did not play a role in lowering blood glucose, then under the guidance of a physician to take hypoglycemic drugs. In conclusion, fasting blood glucose 8.7mmol/L is recommended to consult a doctor in time.