Memory impairment is supposed to be memory loss, and the etiology is completely different according to the different characteristics of memory loss.1. If memory impairment occurs gradually in the elderly, and lasts for a long time, for example, in a few years, or even more than ten years, firstly, we should consider that there may be senile dementia, and also some other metabolic diseases should be taken into account.2. If the elderly have more serious and gradually progressive memory impairment in the short term, for example, a few days, or even a few months, firstly, we should consider organic diseases. A few days, or even a few months, there is a more serious and gradually progressive memory disorder, first of all, we should consider organic diseases, such as whether there is cerebral hemorrhage, cerebral thrombosis, brain tumors, and other diseases.3. However, if young people have this kind of memory disorders, we should also consider internal diseases, such as liver and respiratory diseases, which may also lead to the obstacle of blood supply to the brain, and memory disorders.4. Children and Teenagers who have memory disorders may consider that it has something to do with the child’s state of mind, such as whether there is anorexia and more pressure to study, all of which may be manifested as memory disorders and inattention. Memory disorder is just a small manifestation of certain diseases, so you can’t generalize which disease it is, you have to analyze it in detail.