Whether it is possible to administer insulin directly without hospitalization is recommended to be clarified under the guidance of a doctor. The indications of insulin treatment for diabetes are type 2 diabetes with poor effect of oral hypoglycemic drugs, type 1 diabetes, pancreatic islet failure, etc. If the condition of diabetes is more serious, it is necessary to be hospitalized under the guidance of the doctor’s comprehensive treatment, hospitalization is conducive to the observation of insulin sensitivity and therapeutic effect, which is conducive to the adjustment of insulin dosage, and it is recommended that the patient comply with the doctor’s instructions for treatment. When the patient’s blood glucose control is stable, he can directly inject insulin at home by himself, according to the doctor’s instructions, including sterilization, injection time, injection method, insulin dosage and so on. It is recommended that patients follow the doctor’s instructions for treatment.