Fasting for twenty hours of blood glucose instead of high, may be due to the dawn phenomenon or the Sumuje’s effect caused.
Dawn phenomenon: fasting time up to twenty hours, excessive consumption of glucose in the body, so that the blood glucose is lowered, the body in order to self-protection, in order to avoid hypoglycemia, will make insulin antagonist hormone secretion of glucagon, glucocorticoids and other hormones increase, so that the blood glucose value rises.
Sumuje’s effect: fasting twenty hours measured blood glucose instead of high may also be due to hypoglycemia occurs at night, and then rebound hyperglycemia in the morning.
It is recommended that patients avoid prolonged fasting to avoid hypoglycemia, and if hypoglycemia occurs, it is important to supplement sugary foods or drinks in time to avoid adverse consequences.