The reasons why blood glucose two hours after meal is lower than fasting blood glucose include inappropriate dosage of hypoglycemic drugs, postprandial reactive hypoglycemia, etc., which should be consulted in time, and the medication should be adjusted according to the cause of the disease. 1. Improper dosage of hypoglycemic drugs: larger dosage of hypoglycemic drugs before three meals can lead to postprandial blood glucose lower than fasting blood glucose, and diet and medication can be adjusted according to the blood glucose. 2. Post-meal reactive hypoglycemia: It is a phenomenon in the early stage of type 2 diabetes, the release of insulin after meal is slower than the rise of blood glucose level, so when the insulin concentration in the blood reaches the peak, the blood glucose level has begun to fall, thus hypoglycemic reaction occurs. Two-hour postprandial blood glucose is lower than fasting blood glucose suggests timely medical treatment under the guidance of a doctor.