The balance of blood glucose is dynamic, the source of blood glucose is the release of glucose generated from various channels into the blood to maintain the blood glucose concentration, and the destination of blood glucose is the uptake and utilization by the surrounding tissues as well as the liver. The balance of blood glucose is maintained stable by the action of various glucagon and hypoglycemic hormones. The hormone that lowers blood glucose is insulin, which is the only hypoglycemic hormone in the body and promotes the synthesis of fats, proteins as well as glycogen at the same time and is a pro-synthetic hormone. The hormones that raise blood glucose in the body are glucocorticoids, catecholamines, thyroxine, glucagon, etc., which raise blood glucose through different mechanisms, also known as insulin antagonist hormones. Therefore, when insulin secretion is insufficient or resistance occurs when glucagon decreases, it will lead to increased blood glucose and even diabetes.