Walking half an hour after a meal generally refers to 1.5 hours after a meal, 1.5 hours after a meal of blood glucose than 1 hour after a meal of blood glucose is high may be caused by diabetes. Under normal circumstances, 1.5 hours after meals, blood glucose will be slightly lower than the blood glucose one hour after meals, because after eating blood glucose will begin to rise, the body will secrete the corresponding insulin and then reduce the elevated blood glucose concentration, with the prolongation of the time after the meal, the blood glucose will gradually decrease. In diabetic patients, delayed insulin secretion, insulin resistance and other abnormalities can occur. Delayed insulin secretion can lead to insulin secretion and blood glucose increase can not be synchronized, while insulin resistance can lead to insulin can not effectively promote the uptake of glucose by peripheral tissues or inhibit the output of glucose from the liver, which will lead to a high blood glucose in the 1.5 hours after a meal compared with that in the 1 hour after a meal. It is recommended that people in this group should go to the hospital and undergo tests such as fasting blood glucose, glucose tolerance test and insulin release test to determine whether they have diabetes or not.