The causes of poor memory include physiological function deterioration, poor emotion, poor lifestyle and pathological causes. 1. Physiological deterioration of function, with the increase of age, there will be a gradual deterioration of brain function, which is manifested in memory loss. 2. Emotional problems: emotional problems such as anxiety or depression can also lead to poor memory. 3. Long-term late nights, lack of sleep, alcoholism, excessive stress, nervousness and other poor lifestyle can lead to poor memory. 4. Diseases such as Alzheimer’s disease, Lewy body dementia, cerebral atrophy, and multiple cerebral infarctions can lead to the development of cognitive dysfunction as well as memory loss. When persistent memory loss occurs, it is necessary to consult a doctor in a timely manner to clarify the cause of the disease and take reasonable treatment under the guidance of the doctor.