Low blood sugar when hungry may be caused by physiological reasons, such as irregular eating, picky eating, etc.; may also be caused by pathological reasons, such as diabetes. It is recommended to consult a doctor in time to clarify the cause of the disease and treat the cause. For non-diabetic patients, the diagnostic standard of hypoglycemia is blood glucose <2.8 mmol/L, while diabetic patients receiving medication are considered hypoglycemic as long as their blood glucose is <3.9 mmol/L. If the patient usually eat less food, did not achieve satiety, then it is easy to hunger, then the patient may appear hypoglycemia symptoms, such as dizziness, sweating, hunger, etc.. If hypoglycemia may also be related to diabetes, type 2 diabetes insulin secretion disorder. Patients with the above conditions should go to the hospital in time for examination to clarify the cause of the disease, in order to prevent delays.