Subarachnoid hemorrhage is also relatively common in clinical practice. Patients may experience severe headaches, nausea, and projectile vomiting. The clinical signs generally include positive meningeal irritation signs, typically presenting with neck stiffness, Kernig's sign, and Brudzinski's sign all being positive. Clinically, the diagnosis can be confirmed mainly through cranial CT scans. If conditions permit, lumbar puncture can be performed to ascertain the nature of the cerebrospinal fluid and the intracranial pressure, etc. After a subarachnoid hemorrhage occurs, patients should be admitted to the neurology department for active treatment, and typically receive dehydration therapy to reduce intracranial pressure and neuroprotection among other symptomatic treatments.