There are many clinical diseases that cause hypoglycemia, which are divided into the following three categories: 1. functional, if the intake of carbohydrates is insufficient, or mental factors, excessive fatigue, gastrointestinal disorders, or even a history of gastrointestinal surgery, many will cause hypoglycemia. 2. pathological, such as autoimmune liver disease or insulinoma, pituitary tumor, hypoadrenocorticism, these are also prone to cause hypoglycemia. 3. 3. medication, especially if the diabetic patient eats less and takes more medication, that is, if the diet and exercise and the amount of medication are contradictory, or if the amount of medication is directly used, for example, the amount of insulin is more likely to cause hypoglycemia. There are also many reasons that can cause a hypoglycemia, so it is important to know the treatment of hypoglycemia and then seek the cause.