When a patient experiences hypoglycemia, an increase in blood pressure may occur. During an episode of hypoglycemia, a transient increase in the secretion of adrenocorticotropic hormone, epinephrine, and norepinephrine is caused by sympathetic nerve excitation, which in turn may produce a transient increase in blood pressure in the body. When blood glucose is controlled within the normal range, blood pressure may return to normal automatically. Hypoglycemia is defined as fasting blood glucose <2.8 mmol/L in adults and <4.0 mmol/L in diabetic patients. During an episode of hypoglycemia, sympathetic excitation and hypoglycemic coma often occur, and measures should be taken as soon as possible to restore the patient's blood glucose to normal. In the case of conscious patients, the patient should be given sugary foods immediately, such as sugar cubes, small cookies, and bread. If the patient is comatose, the patient should be taken to the hospital immediately and treated with intravenous glucose solution. When the patient's blood glucose is corrected, the triggers leading to hypoglycemia should be actively sought out and treated for the cause. In addition, the occurrence of hypertension may be caused by a variety of factors, including genetic and environmental factors. In the case of transient hypertension caused by hypoglycemia, the blood pressure will return to normal after the hypoglycemia is corrected. If the hypoglycemia has been corrected but the blood pressure still does not return to normal, then consideration should be given to whether the hypertension is due to another cause. It is important to further identify the cause of hypertension, monitor blood pressure, and give the patient regular treatment once the cause has been identified. For example, patients with primary hypertension can take oral antihypertensive medication under the direction of a doctor.