Normal blood glucose in the morning after meal and high blood glucose after lunch may be caused by not exercising after lunch, eating too much staple food at lunch, and omitting hypoglycemic drugs. 1. No exercise after lunch: blood glucose is normal after the morning meal, high blood glucose after lunch, it may also be after eating lunch, nap, no exercise, energy is not consumed, caused by elevated blood glucose. 2. Eating too much staple food at lunch: blood glucose is normal in the morning after meal and high after lunch, which may be caused by eating too much high-fat and high-calorie food at noon. 3. Omission of hypoglycemic drugs: normal blood glucose in the morning after meals, high blood glucose after lunch, may also be caused by diabetic patients forget to take hypoglycemic drugs before or during meals. If you have normal blood glucose in the morning after a meal and high blood glucose after lunch, it is recommended that you consult a doctor in a timely manner to improve the relevant examinations and to clarify the cause of the disease and then carry out targeted treatment.