Narcolepsy is the lightest state of consciousness and is the lightest state before coma occurs. Patients with cerebral infarction whose infarcts are in the brainstem will experience narcolepsy. Patients with cerebral infarction whose infarcts are in the cerebral hemispheres and have a large infarct area, cerebral edema and increased intracranial pressure in the brain, will also experience drowsiness, and patients with drowsiness must be treated actively to avoid coma and shallow coma. Older people with lung diseases such as lung infections can also aggravate drowsiness and also aggravate brain infarction, so it is necessary to actively control lung infections in patients with brain infarction.