There is a danger of lethargy in patients with cerebral infarction, and both mortality and disability are higher in patients who are lethargic. Lethargy is a kind of consciousness disorder, which is mainly seen in large hemispheric infarction and brainstem infarction. Patients with large hemispheric infarction and brainstem infarction generally have more severe clinical signs and symptoms, and most of them have cerebral edema and increased intracranial pressure, and can have consciousness disorders, including lethargy, somnolence and coma. Drowsiness is a more serious type of consciousness disorder, which is deeper than drowsiness. Most of the patients show that they are unable to wake up to external stimuli, but if they are given strong stimuli, they can be conscious for a short period of time, and after waking up, they can answer the questions briefly, and then the patients enter into drowsiness again very quickly. When the patient falls asleep, he/she should be given the treatment of waking up the brain, and the commonly used drugs are waking up the brain, compound musk injection and Qingkailing injection, and at the same time, he/she should be given the treatment of lowering the cranial pressure, and the commonly used drugs for lowering the cranial pressure are mannitol, glycerol fructose and tachycardia.