Through the above two chapters, we know what is Alzheimer’s disease and the factors of the onset of Alzheimer’s disease. In this chapter, we mainly explain in detail the symptoms of Alzheimer’s disease and what are the precursors of Alzheimer’s disease? These are the questions we are going to answer in this chapter. Please see the following case; Case: Mrs. Ho who complained that her daughter-in-law did not feed her; Mrs. Ho was widowed at the age of 36 and brought up her son alone. Mrs. Ho’s son got married at the age of 40. After the marriage, her daughter-in-law became pregnant and stayed at home to keep the baby, so her son was worried all day long, fearing that something might happen. The son of Mrs. He thought his mother would be happy, but he did not expect things to go against his wishes. When he came home, his mother always cried and cried, scolding his daughter-in-law for being worse than a dog and not giving him food, and often hitting his daughter-in-law’s stomach with a cane when she was not paying attention. The son asked his daughter-in-law, who said that every meal was served to the old man by her own hands, but the old man always said he hadn’t eaten, and the daughter-in-law was in tears of aggression. The filial son took a leave of absence from work to take care of his mother exclusively at home, cooking for her with his own hands and giving her the things she likes best. But the mother, who had just eaten, went to scold the daughter-in-law as usual. This time, the mother made more noise, fuming, scolding her son for marrying a daughter-in-law and forgetting her mother, scolding her son and her daughter-in-law for conspiring not to feed themselves, and saying to people how hard it was for her when she was young, how it was not easy to bring up her son, but now she cannot eat a bowl of rice. The son began to scold his son, and when he saw people, he said how many days he had not eaten. The son was puzzled and found a doctor to ask his mother what was wrong. In fact, these are the typical manifestations of Alzheimer’s disease. Mrs. He’s memory loss is very obvious, after eating a meal and then can not remember that she has eaten. Moreover, Mrs. He’s life was seriously affected by her memory loss, such as always blaming her son and daughter-in-law for not giving her meals, repeatedly crying and scolding her daughter-in-law. Emotional indifference, do not know to care about their family members, the son married at 40, well pregnant, the old lady does not know to care, but always hit her daughter-in-law’s stomach with a cane. These are all symptoms of Alzheimer’s disease. So what are the symptoms of Alzheimer’s disease? What are the premonitory manifestations of Alzheimer’s disease? What are the signs and symptoms of Alzheimer’s disease that tell us that an elderly person has Alzheimer’s disease? Alzheimer’s disease starts in old age, mostly after the age of 60, and is generally more common in women than men. The main common manifestations of Alzheimer’s disease are gradually increasing memory loss, loss of verbal skills, loss of calculation skills and judgment, and changes in mood, behavior and personality, as well as mental disorders. At the beginning, these symptoms are relatively mild and are dominated by near memory loss and personality changes. As the disease worsens, these symptoms also become more prominent and severe, and intelligence such as comprehension, judgment, calculation, and common sense declines, eventually leading to inability to work, inability to take care of oneself, and unclear speech expression. Usually after 5-10 years, it will develop to severe dementia, and the patient will show that she is bedridden all day long, and finally she will die due to some complications such as bed sores and infections. After reading the above, Mrs. He’s son is a little worried, he has been under a lot of pressure, a lot of things, always do this and forget that, busy hands and feet, he will not also have dementia? In fact, Mrs. He’s son is forgetful, not dementia, there is a difference between forgetfulness and dementia.