The reasons for poor memory are as follows: first, due to long-term sleep disorders, clinically part of the patient due to long-term sleep disorders can lead to inattention, memory loss, mainly because of long-term sleep disorders affect the function of brain cells, the patient can have poor memory, it is recommended to adjust sleep as the main. Second, poor memory is also seen in the elderly, as people gradually atherosclerosis with age, can lead to chronic lack of oxygen to brain cells, brain cell function can appear to be reduced, and even the apoptosis of brain cells, the patient can appear poor memory, and can be accompanied by brain atrophy performance. Third, poor memory can be seen clinically in degenerative diseases, such as Alzheimer’s disease, Lewy body dementia, etc., are due to the degeneration of the nervous system leading to poor memory, it is recommended to give patients treatment for the cause. Fourth, poor memory can also be seen in cranial trauma, such as brain contusion, especially the temporal lobe, hippocampus and other brain tissue in charge of memory damage, the patient can have poor memory.