Insulin therapy is an integral part of diabetes medication, so our glucose patients should be aware of some common problems with insulin. In this way the application does not go wrong and helps the balance of blood glucose to fall and effectively control blood glucose to reach the standard. 1, type 1 diabetes requires lifelong insulin replacement therapy, that is, the lifelong application of insulin. But not only type 1 diabetes needs insulin, type 2 diabetes also needs insulin treatment as the function of pancreatic islet cells decay. So insulin treatment needs to be based on the specific situation of insulin secretion of the patient, indeed whether it is necessary to apply, do not psychologically refuse to reject insulin treatment. 2. The following cases of improper use of insulin often occur in the clinic: (1) improper choice of dosage form, such as short-acting and long-acting are not distinguished; postprandial high should be 50R, but 30R is routinely applied; (2) inappropriate dose: blindly adjust the dose, resulting in high and low blood sugar, unstable; (3) storage errors: animal insulin needs to be stored in the refrigerator, while human insulin is above 20 degrees, and can be stored at room temperature for nearly It can be stored at room temperature for nearly one month. 3, the choice of injection method: more commonly used is the pen syringe, conditions or for brittle diabetes, children are best to use insulin pump. Drugs and insulin can be applied together.