Brain atrophy is a slowly progressive process that can only be delayed, not cured or reversed. Brain atrophy refers to the shrinkage of brain tissue that occurs under various physiological and pathological conditions. Various causes can result in the destruction of brain parenchyma and the atrophy, degeneration and necrosis of nerve cells. Nerve cells are permanent cells, non-renewable, and once destroyed, will be irreversible, so brain atrophy can not be reversed. Symptoms such as memory loss and mental behavioral abnormalities can occur after brain atrophy. Common causes include aging, traumatic brain injury, heredity, encephalitis, cerebral thrombosis, excessive alcohol consumption, epilepsy, and neurodegenerative diseases. Although mild cerebral atrophy is irreversible, we can try our best to slow down the progress of cerebral atrophy, and actively treat the original disease for cerebral atrophy caused by other diseases.