Diabetic patients with insulin fasting blood glucose 4.1 mmol / L, blood glucose levels slightly below the control target, such as asymptomatic, can be observed, every other day to retest the blood glucose situation. If symptoms related to hypoglycemia occur, you can choose to eat sweets such as chocolate, candy, etc. under the guidance of the doctor’s treatment, but also oral high sugar fast for energy, or adjust the treatment program. Diabetic patients with fasting blood glucose control target between 4.4~7.0mmol/L and blood glucose 4.1mmol/L after insulin injection, blood glucose is on the low side, and hypoglycemic reactions such as dizziness, palpitations, profuse sweating, and weakness of the limbs may occur. Treatment includes both diet and medication. Diet can be supplemented by eating candies, chocolates, drinking sugar water, etc.; medication can be oral or intravenous push of 50% glucose. After insulin appeared low blood sugar, if there are uncomfortable symptoms, need to actively consult the doctor, follow the doctor’s instructions for reasonable treatment, adjust the hypoglycemic drugs.