The elderly are prone to the following characteristics because of the decline in the function of the organs of the body, the compensatory capacity, reserve capacity, and immune capacity of the body declines with age: 1. 2, insidious onset. 3. Rapid onset and short duration of illness, and easy to develop consciousness disorders. 3.Easy to occur water and electrolyte disorders. 4.Easy to cause multiple organ failure. 5.Easy to occur sequelae and complications. 6.High incidence of malignant tumor. This can explain why some elderly people are fine one day and die the next. This situation is common clinically, and you need all elderly patients’ family members to know the above characteristics in order to find out the problem as soon as possible and send them to the hospital as early as possible.