There are many reasons for deteriorating memory, which can be categorized into physiological and pathological reasons, and pathological reasons include neurological diseases, endocrine diseases and psychological diseases. 1. Physiological: If ageing leads to natural aging of the body, there will be the symptom of deteriorating memory, which is a normal physiological phenomenon and does not require additional special treatment. 2. Pathological: If you suffer from neurological diseases, such as Alzheimer’s disease, cerebral arteriosclerosis and brain tumors, memory loss will be caused by damage to the nerves; endocrine diseases, such as a decline in the function of the thyroid gland, will also cause this symptom because of abnormal metabolism in the body and thus fail to nourish the nerves; psychological disorders, such as depression, anxiety disorders, and schizophrenia, can also lead to this symptom. If the memory loss is obvious, it is recommended to consult a doctor in time to confirm the diagnosis and timely treatment.