Coma caused by cerebellar infarction can usually be awakened after 3-7 days, and usually cerebellar infarction does not cause coma. Its main clinical symptoms include dizziness, vertigo, tinnitus, nausea, vomiting, nystagmus, ataxia and so on. However, the cerebellum is adjacent to the brainstem in anatomical position, and when cerebellar embolism has a large scope, the brainstem is compressed by cerebral edema, resulting in the damage of the reticularis superior activation system of the brainstem, which will lead to coma of the patient, and the peak of the edema will be in about 3-7 days, and the edema will gradually subside and the conscious state of the patient will gradually be improved. After 7 days, the patient’s edema gradually subsides and the patient’s state of consciousness gradually improves. Dehydration and cranial pressure medication, as well as wakefulness medication, such as piracetam, can also shorten the time for patients to recover consciousness, and only a small number of patients with serious conditions will have complications such as lung infection, which will lead to the patient’s inability to awaken and ultimately death.