What is the cause of dozing in the elderly, the elderly love dozing, mainly seen in the following aspects of the cause: 1, to ask the patient has no history of dementia, some patients with dementia because of extensive cerebral cortex atrophy, insufficient blood supply and oxygen supply, it is easy to cause insufficient cerebral blood supply, dozing, drowsiness. 2, the old man loves dozing, if the sleep must be more than usual, the mental state is worse, to ask whether there is a history of hypertension, diabetes, need to do a head MRI to understand whether there is a lobe infarction. Ask whether there is a history of hypertension, diabetes, need to do a brain MRI to understand whether there is a lobe infarction. 3, the elderly dozing, mental state, if poor, to ask the patient whether there is a recent history of cranial trauma, or abrasion injuries, some of the patients subdural or epidural hematoma, the performance of the symptom is to doze off, the mental state of the poor, and this time to do a cranial CT.