Hypoglycemia refers to that the fasting blood glucose concentration of adults is less than 2.8 mmol / L. Hypoglycemia can be diagnosed by blood glucose ≤ 3.9 mmol / L in diabetic patients. Hypoglycemia is a group of syndromes caused by a variety of causes, characterized by low concentration of venous plasma glucose (hereinafter referred to as blood glucose), and clinically characterized by sympathetic nerve excitation and brain cell hypoxia.<br>
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