Poor memory may be related to physiological reasons such as age and poor rest, as well as pathological reasons such as brain diseases. 1. Physiological reasons: when people get older, they may have poor memory; it may also be related to recent work pressure, poor rest and long-term sleep deprivation. 2. Pathological causes: Many brain diseases, such as neurodegenerative diseases, cerebrovascular disease, poisoning, intracranial infection, trauma, etc., can affect the function of the cerebral cortex, resulting in memory loss, and some of them can further develop into dementia. When memory loss is detected, it is recommended to consult a doctor in a timely manner for early intervention and treatment to avoid or delay the progression of the disease.