It is necessary to press the injection site after subcutaneous insulin injection. When diabetic patients perform subcutaneous insulin injection, they must master the correct injection method and accurate insulin dosage to avoid poor glycemic control or hypoglycemia. In the process of insulin injection, the following points should be paid attention to: I. Do a good job of sterilizing the local skin and hands before injection. Second, adjust the insulin dosage accurately. Determine the angle of injection according to the thickness of subcutaneous fat and the length of the needle. Fourth, after subcutaneous injection of insulin, the insulin injection pen stays under the skin for at least ten seconds to avoid oozing around the needle. Fifth, when pulling out the needle you need to use a dry cotton swab to press for two seconds, note that it is pressing rather than massaging the injection site, so as to avoid bleeding at the injection site. Sixth, pay attention to the rotation of the injection site, to avoid long-term injection of the same site.