An ischaemic stroke happens when a blood clot, or other blockage, cuts off the blood supply to your brain. This is the most common type of stroke.
Find out more about the different types of stroke and why they happen.
Most strokes happen because of a blockage in an artery. A common cause of this is disease in the large carotid arteries in the front of your neck. This guide explains what can cause carotid artery disease and how it can be treated.
High blood pressure is one of the biggest risk factors for stroke. It is a contributing factor in around half of all strokes.