There are many reasons for poor memory: 1. Clinically, the most common is the gradual degeneration of brain function as age increases, which can be manifested as gradual memory loss. 2. Some diseases can also lead to poor memory, such as Alzheimer’s disease, Lewy body dementia, brain atrophy in the elderly, and multiple lacunar cerebral infarcts, leading to a lacunar state, which can also manifest as poor memory and cognitive function. 3, may also be accompanied by emotional problems, such as anxiety or depression, can lead to poor memory. 4, many young people clinically because of poor lifestyle can also lead to poor memory, such as long-term alcohol abuse, irregular work and rest, staying up late and sleep deprivation, mental tension, excessive stress can easily lead to memory loss.