What happened to the old man who couldn’t wake up from drowsiness? If an elderly person does not wake up, there are several possible causes: first, cerebrovascular disease, both cerebral infarction and cerebral hemorrhage can cause impaired consciousness, and after the patient becomes impaired, he cannot wake up. Second, the patient may have lung infection or other diseases, such as dementia, Parkinson’s disease and so on. These diseases are also prone to drowsiness and sleepiness, which also require a clear diagnosis at the hospital. Thirdly, elderly people may suffer from narcolepsy, and narcolepsy should also go to the neurology department of the hospital and be treated under the guidance of a professional doctor.