A brain hemorrhage of 30 mL is serious. Usually, if the hemorrhage reaches 30 mL in the cerebral hemisphere, surgery should be considered for treatment and the hematoma should be removed by craniotomy. The patient should also be bedridden, given dehydration, reduce intracranial pressure, and promote the recovery of neurological deficits. However, no matter which surgery is performed, there may be residual sequelae of varying degrees, mainly related to the site of bleeding. If the patient has a brain hemorrhage of 30mL in a critical location such as the cerebellum or brainstem, it will be very serious and the patient may rapidly go into problems with loss of respiration and heartbeat, as well as a large number of serious complications like cerebrocardiac syndrome.