For the diabetic population, it is possible to be hungry at night and have high blood glucose the next day, i.e., hyperglycemia after hypoglycemia, but it is also possible to have low blood glucose the next day; for the normal population, hypoglycemia may occur or there may be no significant change. Many diabetic patients, due to a long history of the disease, are prone to neurotransmitter deficiencies, and these patients usually do not experience alarm phase symptoms such as panic, shaking hands, or cold sweats, but go directly into a period of central inhibition, where the only way to know that blood sugar is low is to take a glucose reading. In some patients, rebound hyperglycemia, i.e., the dawn phenomenon, is due to the body’s protection of itself, the body’s glucagon level is significantly increased, so it will lead to hyperglycemia after hypoglycemia. Hunger will also accelerate the body’s liver glycogen decomposition, glycogen decomposition will produce a large amount of glucose released into the blood, which may also cause an increase in blood glucose. For normal people, starvation at night may result in lower blood glucose the next day, or there may be no significant change, depending on the individual’s physical condition. Starvation at night may cause an increase in fasting blood glucose the next day. It is recommended to organize your meals in order to avoid fluctuations in blood glucose.