Low blood glucose is not directly related to diabetes, low blood glucose cannot be diagnosed as diabetes, the common causes of low blood glucose are as follows: 1. fasting hypoglycemia, common in pancreatic β-cell tumor, patients show repeated and serious fasting hypoglycemia, blood glucose is often lower than 2.8 mmol/L, the effect of giving conventional glucose supplementation treatment is poor. 2. hepatic hypoglycemia, patients often have impaired liver function, liver glycogen reserve, and can have hepatic hypoglycemia. 3. 3. Alcoholic hypoglycemia, if the patient does not eat carbohydrates in time after drinking alcohol, hypoglycemia can occur, and hypoglycemia can be corrected quickly by giving glucose supplementation in general.