There are many reasons for blurred consciousness after craniotomy, and hydrocephalus is one of them. Blurred consciousness after craniotomy may be caused by the original disease (such as cerebral hemorrhage, cerebral infarction, brain tumor, etc.), but also may be due to the craniotomy surgery damage to the brain tissue and cerebral nerves, such as intraoperative excessive pulling on the brain tissue, resulting in cerebral edema aggravation which leads to blurred consciousness of the patient. Hydrocephalus can also cause blurred consciousness, if the postoperative cerebrospinal fluid circulation is impaired, severe hydrocephalus, affecting the brain pic patients may have blurred consciousness, but this kind of situation is relatively rare. Blurred consciousness after craniotomy should be timely consultation, identify the cause of the disease, and timely treatment.