When you eat a lot of food two hours after the meal blood sugar will have a certain degree of elevation, if the healthy people will not rise too obvious, if diabetic patients tend to rise more obvious. Food contains calories and sugar, after eating food in the body after digestion, absorption of blood glucose will rise, so eat a lot of food when the two hours after the meal blood glucose will have a certain degree of elevation. However, normal people will also secrete insulin accordingly after eating to control the elevated blood glucose concentration, so that blood glucose does not exceed the normal range. However, in diabetic patients, due to abnormalities such as absolute lack of insulin or insufficient insulin secretion, insulin resistance, etc., blood glucose rises after eating but there is no corresponding insulin level to lower the blood glucose, resulting in blood glucose exceeding the normal range. It is recommended to go to the hospital when abnormal blood glucose two hours after meal occurs.