The difference between subarachnoid hemorrhage and cerebral hemorrhage lies in the etiology, clinical manifestations, and imaging examinations. 1. Different etiology: subarachnoid hemorrhage refers to the rupture of intracranial blood vessels and blood flow into the subarachnoid space, which is divided into spontaneous and traumatic, of which spontaneous subarachnoid hemorrhage is mainly caused by aneurysm and cerebrovascular malformation. Cerebral hemorrhage refers to non-traumatic hemorrhage within the brain parenchyma, the vast majority of which is caused by hypertension combined with small atherosclerotic blood vessel rupture. 2. Clinical manifestations: subarachnoid hemorrhage is mainly manifested by sudden severe headache as well as meningeal irritation such as neck stiffness, vomiting and headache, and ocular symptoms such as ptosis and fundus hemorrhage. The main clinical manifestations of cerebral hemorrhage are “three partial signs”, i.e. hemiparesis of the opposite side of one side of the hemorrhage, weakness, numbness and other symptoms of limbs, as well as partial blindness on one side. 3. Imaging examination is different: Cranial CT examination of subarachnoid hemorrhage has high sensitivity in the early stage of hemorrhage, which can show high-density hemorrhage signs on the surface of the brain and the subarachnoid space, while the CT lesions of cerebral hemorrhage are mostly round or oval homogeneous high-density areas, and high-density casts are more often seen in the case of large amount of ventricular hemorrhage. If the patient is not feeling well, he should go to the hospital in time to find out the cause of the disease and actively cooperate with the doctor’s treatment.