Brain hemorrhage is a type of stroke. It happens when a weakened blood vessel in your brain starts to bleed or the brain suddenly bursts. As your brain cells can't get enough oxygen and nutrients. That can severely damage them.Your skull does a better job of protecting your brain by keeping it tightly contained. There's not a lot of space between your brain and skull. It is a very sensitive area in the brain. But that means conditions can quickly increase pressure on your brain cells, which reduces vital blood flow and can damage brain cells.