When diabetic patients experience hypoglycemia, they should first eat appropriately to avoid further decline in blood sugar. Then go to the hospital in time, adjust the insulin dosage under the guidance of the physician, and avoid blindly stopping and reducing the medication. Hypoglycemia is one of the common complications of insulin injection for the treatment of diabetes mellitus. It can be diagnosed as hypoglycemia if a diabetic patient’s blood glucose is lower than 3.9 mmol/L, which is commonly caused by insufficient eating, fluctuation of the condition, and improper use of insulin. The main symptoms include palpitations, weakness, sweating, dizziness, etc. If it lasts too long, it can cause epilepsy, coma and even death, and should be taken seriously. When diabetic patients experience symptoms of hypoglycemia, they should first eat appropriately to avoid further drop in blood sugar causing serious consequences, and avoid blindly stopping insulin, which may cause fluctuation in blood sugar. They should go to the hospital in time and adjust the type and dosage of insulin under the guidance of physicians. In daily life, monitor blood glucose regularly and go to endocrine outpatient clinic for follow-up, so as to adjust the treatment plan in time and maintain the blood glucose in a more stable state.