If blood sugar needs to drop as soon as possible, first of all, meals should be controlled, requiring meals to be eight minutes full, not to eat foods that are too sweet and too high in calories, and appropriate activities after meals, generally requiring aerobic exercise for an hour or so after meals, including running, swimming, doing exercises and other exercises. If the blood sugar still does not drop significantly or does not drop satisfactorily, fasting more than 10 mmol/L, it is recommended to treat with oral medication or insulin. For people who have not been treated with insulin, it is better to start with 0.5 units per kilogram of body weight, for example, for people who weigh 60kg, insulin can start with 30 units per day, pay attention to monitoring fasting and post-meal and bedtime blood glucose, and adjust the insulin dosage according to blood glucose.