Hypoglycemia can occur due to the application of various glucose-lowering drugs in the process of diabetes treatment. The common causes of hypoglycemia in diabetic patients are as follows: 1. Improper use or overdose of insulin in the process of hypoglycemia. 2. Improper use or overdose of insulin-producing drugs. 3. Inadequate intake of food in diabetic patients. 4. Excessive exercise. 5. Decreased clearance of hypoglycemic drugs, insulin or oral hypoglycemic drugs in diabetic patients with renal insufficiency. 6. Excessive alcohol consumption, especially fasting Drinking alcohol, etc. Since hypoglycemia can give serious harm to diabetes, it is important to treat the cause to avoid hypoglycemia. In a word, as long as individualized treatment is taken for diabetic patients and the relationship between strict sugar reduction and safe sugar reduction is balanced, not only can blood sugar be well controlled, but also the occurrence of hypoglycemia can be avoided.