A brain hemorrhage occurs when a blood vessel in the brain ruptures or becomes more permeable, causing blood to leak out of the vessel and spill into the brain tissue. The sudden increase in pressure in the brain can damage the brain cells surrounding the hematoma. If the blood flows quickly, the sudden increase in pressure can lead to loss of consciousness or death. According to health experts, about 13% - 15% of strokes occur due to brain hemorrhage.

Hypertensive neurological emergencies have high rates of complications and mortality, so blood pressure control in neurological emergencies is beneficial, but can also be harmful if not done in the best way.