What causes a stroke?

A stroke occurs when the blood supply to the brain is blocked, or when there’s a bleed into the brain. Like all organs, the brain needs oxygen and nutrients to function properly. These are provided by the blood supply.

When a clot forms, it can create a blockage in a blood vessel that leads to the brain. This blockage cuts off the blood flow to an area of the brain, causing damage by not allowing oxygen to get to that area of the brain. This can lead to brain damage, both temporary and permanent, depending how long the blood supply is cut off.