Subarachnoid hemorrhage caused by car accidents usually requires hospitalization ranging from about 2 to 8 weeks, and the exact number of days in the hospital is related to the amount of bleeding and the timeliness of treatment. If the amount of bleeding is small, and the treatment is timely, and there are no obvious complications, the patient can usually be rechecked in about 2 weeks, and if the bleeding has been absorbed, the patient can be discharged from the hospital for recuperation. If the bleeding volume of the subarachnoid hemorrhage caused by the car accident is larger, even if the treatment is timely, there may be more obvious complications, such as hydrocephalus, brain swelling, etc., and its hospitalization may be relatively longer, and it may take about 4 to 8 weeks to be hospitalized. If recovery is not yet complete, hasty discharge should be avoided to prevent re-bleeding and life-threatening conditions. Whether and when the patient can be discharged from the hospital should also be determined by a medical professional after assessing the patient.