Diabetic patients who are receiving oral hypoglycemic drugs or insulin therapy are considered to have hypoglycemia when their blood sugar is lower than 3.9 mmol/L. Hypoglycemia is the most common acute complication in diabetic patients undergoing treatment. The main causes of low blood sugar in diabetic patients are as follows: 1. The dose of medication is too large, or when the treatment process fails to regularly review the blood sugar and adjust the dose of medication in a timely manner. 2. The diet is too little or irregular. The diet of diabetic patients should be regular, quantitative and regular, so that the diet is regular The diet should be regular. If the patient often eats too much and the eating time is too different, often eating too little or delaying the meal time, hypoglycemia will easily occur. 3, too much exercise, if diabetic patients exercise too much, too much calorie consumption, also prone to hypoglycemia. 4, diabetes combined with other diseases, such as combined with hyperaldosteronism, will easily occur hypoglycemia.