Healthy people have strong neurological and endocrine regulation, so when blood sugar decreases due to prolonged hunger, various hormones that can raise blood sugar by fighting against insulin in the body will be released immediately, thus helping blood sugar to return to normal level soon, which generally does not cause any serious harm. In the case of diabetic patients with poor blood sugar regulation, especially if they have to take hypoglycemic drugs to stimulate insulin secretion or inject insulin, the chance of hypoglycemia is higher and the harm is more serious, so we have to emphasize it in particular. And the harm of hypoglycemia is more prominent in the elderly diabetic patients! Older people mostly have decreased liver and kidney function, and even combined with diabetic nephropathy, oral hypoglycemic drugs and insulin excretion is slow, easy to accumulate in the body causing drug overdose, so it is more likely to occur hypoglycemia. Once hypoglycemia occurs, it can induce cerebrovascular accident or myocardial infarction, so the danger is very serious. In addition, elderly patients generally have been ill for a long time, often accompanied by diabetic neuropathy, sympathetic nerve insensitivity; and in the long-term disease process, repeated episodes of hypoglycemia reduce a person’s sensitivity to hypoglycemia, so many elderly patients occur hypoglycemia, there is no panic, shivering, cold sweat and other autonomic warning symptoms that are easy for patients to detect, and directly coma, often still unaware of They are often still unaware of the fact that they are talking happily with someone, or that they have fainted coldly on the way to the morning exercise with great excitement, which will inevitably lead to serious consequences if no one is around to help with first aid.