Low blood sugar can be a precursor to diabetes, but it can also be triggered by excessive use of hypoglycemic drugs, excessive starvation, or after major surgery. There are many types of diabetes, some of the patients with type 2 diabetes, in the early stage of the disease due to delayed insulin secretion, there may be the phenomenon of hypoglycemia before the next meal, that is, the patient usually panic, hand shaking and sweating and other symptoms of hypoglycemia, but this kind of diabetes leads to hypoglycemia, usually timely intake of sugar and water can be quickly relieved. If hypoglycemia exists with the above characteristics, it may be a precursor of diabetes. However, it may also be due to the recent excessive use of some hypoglycemic drugs in life triggered by hypoglycemia; and may also be due to some major surgery, such as gastrectomy, etc., due to the stress reaction caused by hypoglycemia. Therefore, whether low blood sugar is a precursor of diabetes or not, it is necessary to consult a doctor for further diagnosis and treatment.