The recovery period for subarachnoid hemorrhage is four to six weeks, during which absolute bed rest is theoretically required. Subarachnoid hemorrhage is a severe emergency in internal medicine with a very high mortality rate. Common causes of subarachnoid hemorrhage include cerebral vascular malformation, cerebral aneurysm, and rupture of blood vessels into the subarachnoid space, causing various symptoms. The main symptoms include severe headache, increased intracranial pressure, nausea, and vomiting. There are three layers of meninges in the subarachnoid space, consisting of the pia mater, arachnoid mater, and dura mater. Between the pia mater and the arachnoid mater is the subarachnoid space. Following a subarachnoid hemorrhage, a large amount of blood enters the subarachnoid space, leading to increased intracranial pressure, which can cause cerebral edema, brain cell death, and even brain herniation, potentially compressing the respiratory control center and leading to death. Without proper treatment, the mortality rate of a second subarachnoid hemorrhage can reach up to 50%, and for a third subarachnoid hemorrhage, survival is almost impossible with the mortality rate nearly 100%.