The causes of poor memory can be divided into physiological factors, such as stress and poor rest, and pathological factors, such as dementia, stroke and other related diseases. 1. Physiological factors: Usually the patients are young and have recent triggering factors such as staying up late at night, being tired and under stress, generally through sufficient rest and mental adjustment, the memory will gradually recover without any special treatment or after-effects. 2. Pathological factors: patients are older and have previous cerebrovascular diseases, such as cerebral infarction and cerebral hemorrhage. If the patient’s forgetfulness and poor memory progress slowly, he/she needs to consider senile dementia. If the symptoms of forgetfulness and poor memory gradually aggravate and are accompanied by other discomforts, it is recommended that the patient go to the hospital in time to clarify the cause of the disease and carry out standardized treatment under the guidance of the doctor.