A diabetic patient injecting 12 units of insulin a day is relatively unserious. The dosage of insulin is determined by the patient’s blood glucose condition, patient’s body weight, sensitivity to insulin, etc. The dosage is usually calculated at 0.1~0.2 units per kilogram, and it is adjusted according to the patient’s blood glucose condition, insulin resistance, and use of hypoglycemic drugs. Strict dietary control and insulin use are required as prescribed by the doctor. The use of insulin in diabetic patients can effectively control blood glucose, and is good for emergency blood glucose elevation, diabetic complications, gestational diabetes, and before surgery. Diabetic patients with 12 units of insulin at a time is generally relatively not serious, but also need to be analyzed according to the patient’s specific situation. Patients using insulin need to follow the doctor’s instructions, according to the individual situation for use.