brain but a blood vessel that's piercing deep into the brain typically will rupture because of many years of high blood pressure that many years of high blood pressure pushing against the surface of that blood vessel wall weakens the blood vessel wall and one day it gives way and it starts bleeding so if we could control everybody's blood pressure we would see very few of these hemorrhages because the vast majority of these deep in the brain hemorrhages are caused by high blood pressure there are some other unusual reasons like having