Whether a brain hemorrhage requires a craniotomy depends on the patient’s own condition. If the supratentorial hematoma exceeds 30mL and the infratentorial hematoma exceeds 10mL, surgery must be performed. Of course, it is not an absolute indication, but it also depends on the patient’s consciousness. In some patients, such as elderly patients with brain atrophy, supratentorial hematoma over 40mL may not necessarily be symptomatic, not necessarily confused, but still conscious, and this kind of surgery is not necessarily done. Because of the posterior cranial fossa edema, it may affect the brainstem, and compression of the brainstem will affect breathing, and it will be more dangerous not to do surgery. If the patient comes to the hospital in a generally good condition and is conscious, conservative treatment is generally recommended, but once the patient comes to a coma, surgery is still recommended. Without causing obstructive cerebral hemorrhage, conservative treatment is generally preferred, although the patient may be comatose.