Patients with narcolepsy generally show excessive thoughts of sleep, excessive sleep time, and relatively firm sleep, etc. Most of them can be woken up, and after waking up, they can communicate with people and answer questions normally, and after stopping communication with people, patients can fall asleep again. There are various causes of drowsiness, including cerebrovascular diseases, systemic diseases, etc., as follows: 1. Cerebrovascular diseases: such as cerebrovascular diseases, massive cerebral infarction, massive cerebral hemorrhage, severe encephalitis, severe craniocerebral trauma, brain tumors, etc., patients may experience drowsiness. 2. Systemic diseases: such as high blood pressure may cause hypertensive encephalopathy, if hypoglycemia is severe, it may cause hypoglycemia Encephalopathy, carbon monoxide poisoning may cause carbon monoxide toxic encephalopathy, food and drug poisoning may cause food and drug poisoning encephalopathy, all of which may lead to drowsiness. Narcolepsy is a disorder of consciousness, a milder one.