The incidence of Alzheimer’s disease, also known as senile dementia, increases with age, with a prevalence of about 5% over the age of 65 and 20% or higher over the age of 85, with more women than men. Symptoms The initial manifestation of Alzheimer’s disease is mainly near memory loss, unable to remember what just happened or what was just said, forgetting the names of acquaintances, but remembering older things vividly, so that family members can easily mistake good memory; it is worth noting that in the early stage of Alzheimer’s disease, although there is obvious memory loss, it usually does not affect social interactions and original work, which is due to the fact that in doing the original very familiar work, once the question is raised, the patient will not be able to remember anything. familiar work, and their work incompetence can only be detected once a new work task is proposed. Some elderly people show obvious personality and behavioral changes, such as previously mild-tempered and generous, but now become irritable, selfish and narrow-minded, unreasonable and suspicious; previously bad-tempered, but now especially obedient. Most patients show disinterest in things around them, lack of enthusiasm, and inability to complete the work they have become accustomed to. Some patients show restlessness, such as walking around the room aimlessly, or getting up in the middle of the night and touching around, opening and closing the door to move things, etc. As the disease progresses, patients may develop visual-spatial skill impairment, manifesting as difficulty distinguishing between the southeast and northwest and the possibility of getting lost if they walk a little farther. Some patients may not be able to distinguish between front and back when dressing. In patients with mid-stage Alzheimer’s disease, both distant and near memory are significantly impaired. Language impairment occurs. Calculation power decreases. In advanced stages, patients do not recognize their surroundings, do not know the year or the season, cannot add or subtract within 10, lose even the most basic daily living skills, need care from others, are paralyzed in bed, and are in a state of silence. Many people, especially middle-aged and elderly people, may have this experience, once they are over 50 years old, they feel that their memory is not good enough, but they usually think that people are old and it is a natural phenomenon, so they do not care about it. Therefore, when the elderly people around you have memory loss, slow reaction, loss of focus, indifference, nagging and suspicious, do not think that it is normal old age, you should seek professional medical treatment in time.