The following reasons need to be considered: 1. whether rebleeding occurs in the skull, because rebleeding will lead to increased intracranial pressure, and increased intracranial pressure will cause changes in the patient’s consciousness and mind, and requires a review of the head CT. 2. cerebral edema, because cerebral edema is a stage that must be experienced in the development of the disease, and the consequence of cerebral edema is that it will cause increased intracranial pressure, and increased intracranial pressure will also cause the patient’s The main thing is to strengthen the dehydration treatment. 3, craniotomy needs to be alert to the occurrence of intracranial infection. Intracranial infections can also cause gibberish, so it is necessary to improve the cerebrospinal fluid routine, smear, biochemical and culture examination to clarify the occurrence of intracranial infections.