The risk period for traumatic subarachnoid hemorrhage is usually within 7 to 14 days. After a traumatic brain injury resulting in subarachnoid hemorrhage, the brain tissue may continue to be congested and swollen for 7 to 14 days, and intracranial pressure may increase, and cerebral edema or rebleeding may occur. In addition, traumatic subarachnoid hemorrhage can easily stimulate cerebral blood vessels, causing cerebral vasospasm and cerebral infarction, and the duration of cerebral vasospasm is about 7 days. Generally speaking, 1~3 days after the operation is the peak period of rebleeding, 10~14 days is the peak period of cerebral edema, during this period, you can follow the doctor’s instructions to use mannitol infusion treatment to reduce brain tissue edema, as well as nifedipine to control blood pressure. Usually, we should pay attention to bed rest, and closely observe the changes of the condition. Traumatic subarachnoid hemorrhage is more serious, it is recommended that the patient under the guidance of the doctor to actively treat, so as to avoid delaying the condition, resulting in serious consequences.