High glucose is handled in different ways for different values, and the common way of handling it is to have a low-sugar diet with no porridge or sweets. Diabetes mellitus is diagnosed if blood glucose > 7.0mmol/L and two hours after meal > 11.1mmol/L. Diabetes is treated with oral hypoglycemic agents, commonly glimepiride, acarbose, metformin, rosiglitazone, and the newest out of the box DPP-4 inhibitors such as Amritzer and saxagliptin. If blood sugar is very high, such as glycated hemoglobin > 9.0%, fasting blood sugar > 10 mmol/L, and two-hour postprandial blood sugar > 15 mmol/L, insulin therapy is required. The commonly used types of insulin are classified as long-acting, intermediate-acting, short-acting, and premixed, and depending on the blood glucose, the doctor will use a different type of insulin.