High blood glucose in the morning in diabetic patients may be related to factors such as the previous night’s diet, dawn phenomenon, Sumuje effect and inappropriate medication regimen of the patient. 1. Diet of the previous night: high blood glucose in the morning may be caused by the patient’s excessive intake of calories the previous night, such as cake, milk tea, peanut butter, cheese, and so on. 2. Dawn phenomenon: i.e. good blood glucose control at night and no hypoglycemic phenomenon occurs, only a transient high blood glucose occurs at dawn, which may be due to excessive secretion of free cortisol and growth hormone in the early morning. 3. Drug treatment program: unreasonable glucose-lowering drug treatment program can also lead to high blood glucose in the morning, such as insufficient insulin application at night. Blood glucose changes at night should be monitored. It is recommended that diabetic patients with high blood glucose in the morning should go to the endocrinology department of regular hospitals for detailed consultation.