The decision to have a craniotomy needs to be based on the patient’s condition. Common intracranial hemorrhages include cerebral hemorrhage, subarachnoid hemorrhage, and subdural hemorrhage, all of which generally require surgery. 1. Cerebral hemorrhage: It is generally believed that cerebral hemispheric hemorrhage is greater than 30 milliliters, cerebellar hemorrhage is greater than 10 milliliters can be craniotomy. 2. Subarachnoid hemorrhage: traumatic subarachnoid hemorrhage is usually treated conservatively, spontaneous subarachnoid hemorrhage should be considered as rupture of intracranial aneurysm, and should be further examined. If intracranial aneurysm is detected, elective or emergency intracranial aneurysm embolization can be chosen, and if it is a huge aneurysm, then craniotomy should be considered. 3. Subdural hemorrhage: Subdural hemorrhage is divided into acute and chronic. Acute subdural hemorrhage can choose surgical treatment, generally take the bone flap and bone window craniotomy, chronic subdural hemorrhage patients who have obvious symptoms should be surgical treatment, preferred drilling tube drainage. Intracranial hemorrhage is a common and serious disease in neurosurgery, and should be diagnosed and treated in a timely manner, otherwise, cerebral edema or progressive intracranial pressure increase may occur, resulting in the formation of cerebral herniation and thus endangering the life.