High blood glucose after surgery usually returns to normal in about 2~4 weeks, but this varies from person to person and consultation with your doctor is recommended. Due to reactions such as stress trauma and postoperative inflammation after surgery, it may lead to a persistent elevation of blood glucose after surgery, usually in about 2~4 weeks. By adjusting the insulin dose, dietary structure and strengthening the postoperative dressing change as well as cleansing, the patient’s blood glucose will usually return to normal gradually after surgery. In addition, patients can be given appropriate treatment, such as adjusting the dose of insulin and hypoglycemic drugs, etc., will be significantly improved. In case of diabetic patients undergoing surgery, strict attention needs to be paid to the changes in blood glucose before and after surgery to keep the blood glucose under satisfactory control. Postoperative high blood sugar should also pay attention to the need for strict dietary control, avoid eating high-calorie, high-sugar, high-fat food, postoperative discomfort symptoms, timely access to medical care.