Many people, especially middle-aged and older friends may have this experience, once over 50 years old, you feel that memory can not, before a glance, listen to a time to remember things, now especially love to forget. Although sometimes feel that you should think of some way, but often a “old, brain can not” after, will not care too much. Perhaps you do not know that this can sometimes delay the big event, which could have been detected and treated early, but missed the best time to prevent and treat Alzheimer’s disease: Alzheimer’s disease is a common neurodegenerative disease that can cause memory, calculation, language and cognitive thinking ability and other intellectual impairment, memory loss is its core symptoms. The onset of Alzheimer’s disease is slow, and the initial manifestations are usually not very obvious. Some people are irritable and irritable, and they are very angry, quarrel with others, and lose their temper; some people are unrestrained and unrestrained, and they cannot restrain themselves. Secondly, the memory is diminished, the first to suffer is the near memory, can not remember what has just done, said, some have just eaten, but also said that they have not eaten, often forget things, forget what they promised; individual in order to make up for the memory deficiency, there are often misconceptions or fiction; serious understanding, judgment, calculation and other intelligence overall decline, work ability and social adaptability is increasingly reduced, emotional reaction childish, and In severe cases, there is a general decline in comprehension, judgment, calculation and other intelligence, and the ability to work and socially adapt is decreasing. With the further development of the disease, speech disorders, slurred speech, garbled speech, and eventual loss of speech are common; in the later stages, the patient is bedridden, incontinent, and unable to take care of himself, and dies from complications. To diagnose this disease, a detailed examination should also be performed, among which CT scan is helpful. The most reliable is biopsy. The pathological changes are massive loss of brain cells, accompanied by glial fibroblast proliferation, brain atrophy, and relative enlargement of the ventricles. With the advancement of medicine, we now have medications that can treat Alzheimer’s disease and promise to slow the progression of the disease with medications administered early in the disease. Early detection and early treatment of Alzheimer’s disease can lead to better results at a smaller cost. Therefore, when an elderly person near you has memory loss, slow reaction, loss of concentration, indifference, nagging and suspicious, do not think it is normal old age, but should seek professional medical attention in time.