The scientific name of Alzheimer’s disease is Alzheimer’s disease, which is very common in clinical practice, and more and more young people have symptoms similar to Alzheimer’s disease, Alzheimer’s disease is not only limited to the elderly. If it occurs before the age of 65, it is called early-onset dementia, and it becomes Alzheimer’s disease at the age of 65 or older. It is divided into three stages: the first stage, mild dementia, is characterized by memory loss, especially for recent memory forgetfulness, and the inability to process complex matters perfectly. In the second stage, moderate dementia, both distant and recent memory are severely impaired, and the person is basically unable to perform outdoor activities independently. The third stage, severe dementia, basically resembles the state of an infant, with incontinence and inability to care for oneself, and many people die during this stage.