Diabetic hyperosmolar hyperglycemic syndrome is a relatively common acute complication, more common in elderly diabetic patients, especially those over 75 years of age, because the entire brain function of such patients has a certain degree of decompensation, and will not be very sensitive to such conditions as infection, including dehydration, such a basis will lead to the aggravation of infection, in the case of infection aggravation of dehydration further deterioration, will be complicated by hyperosmolar hyperglycemia This is the case. Young diabetic patients, because the whole body organs are relatively sensitive, are able to respond to hyperglycemia, dehydration and infection in a timely manner, so that it is better to intervene in such a state of hypertonicity in a timely manner. The mortality rate of diabetic hypertonic hyperglycemia syndrome is relatively high, higher than the mortality rate of acute complications of ketoacidosis.