A stroke happens when the blood supply to part of the brain is suddenly reduced or stopped. That part of the brain dies and no longer works. Blood cannot get to your brain when a blood vessel is blocked or bursts inside the brain. A blood clot or fatty deposit called a plaque forms inside a blood vessel, breaks away, and blocks an artery in the brain. An artery in the brain tears or bursts.
Blood spills out into the brain.
This kind of stroke often happens with no warning. It most often results from high blood pressure. Sometimes it is caused by a blood vessel problem that has been there since birth. You have heart disease. You have diabetes You have high cholesterol.