The reasons for high blood glucose at 18:00 p.m. include dietary factors, medication factors, lack of exercise, etc. It is recommended to consult a doctor. 1. Dietary factors: If the patient eats a large amount of food before 18:00 pm, the blood sugar will increase. 2. Medication factors: Patients with a history of diabetes should choose appropriate hypoglycemic drugs to bring their blood glucose up to the standard according to their blood glucose situation. If the patient’s glucose-lowering drugs are not used properly, there can be a significant increase in blood sugar after meals, which can be manifested as high blood sugar at 18:00 pm. 3. Lack of exercise: diabetic patients diet and exercise is the core of blood glucose control, if the patient lacks exercise every day can also appear blood glucose 18:00 pm high. Blood sugar 18:00 pm high, it is recommended to go to the regular hospital for a clear diagnosis, and then give standardized regulation.