The slightly high fasting blood sugar may be more than 6.1mmol/L, which has not reached the diagnosis standard of diabetes. This situation should be handled as follows: 1. Patients should pay attention to a slight control at dinner, do not eat too much or too full, and carry out appropriate activities after the meal, because the change of blood sugar after dinner has a more direct impact on fasting blood sugar. If the overall blood sugar is low after dinner, fasting will not be too high. 2. Without any special circumstances, you must not add meals or late night snacks at night, which will also lead to an increase in fasting blood sugar. 3. Obese patients with slightly high fasting blood sugar can be advised to add a metformin extended-release tablet at night. On the one hand, it is beneficial to weight control and improve insulin sensitivity; on the other hand, metformin extended-release tablets taken orally at night can be very effective in reducing fasting blood sugar.