Elevated blood glucose does not necessarily mean that you need to take insulin, high blood glucose need to take insulin, clinically, generally divided into the following two cases. First, diabetes has been diagnosed, even if the blood sugar is not high, but in the case of pregnancy, surgery, stress, trauma and other conditions, it is recommended to apply insulin treatment. When the trauma, pregnancy, stress and other conditions disappear, you can decide whether to continue insulin treatment or change to oral drug treatment according to the blood glucose situation. Secondly, if glycated hemoglobin is greater than 9.0% and fasting blood glucose is greater than 11.1mmol/L, and accompanied by obvious symptoms such as dry mouth, drinking, urinating, and eating, then insulin treatment should be started.