Patients keep forgetting things, the most likely disease is suffering from dementia, the most common causes of dementia are two categories, as follows: First, Alzheimer’s disease: also called senile dementia, mainly seen in older people over 60 years old, patients mostly show progressive memory, intelligence, calculation, judgment, comprehension, and language dysfunction, etc., usually do a cranial magnetic resonance examination can be found Brain atrophy, but there is no obvious brain infarction, the scale check score reaches the standard of dementia, and the patient’s social function and daily living ability will be reduced. Second, vascular dementia: It is mainly due to brain cell necrosis caused by repeated cerebral ischemia or cerebral hemorrhage, which causes an overall decline in cognitive function and finally leads to memory loss and always forgetting things. These are the two most common diseases that cause forgetfulness all the time.