- High blood pressure, which is a contributing factor in around half of all strokes.
- Cerebral amyloid angiopathy is a condition where a protein called amyloid builds up inside the blood vessels in the brain. This causes damage and makes your blood vessels more likely to tear. This condition is more common among older people.
- An aneurysm is a weak spot on an artery, where the walls have become thin and weak. This means that they can sometimes burst, especially if you have high blood pressure. Some aneurysms are present from birth, but some things can make you more likely to develop one, including smoking, high blood pressure, and having a family history of aneurysm.
- Anticoagulant medication helps to prevent blood clots forming. If you have an irregular heartbeat (known as atrial fibrillation) it’s likely that you will be given this type of medication to help reduce your risk of stroke. When you are on anticoagulant treatment you will be carefully monitored to reduce the chance of bleeding.
- Illegal drugs, such as cocaine, can irritate blood vessel walls making them weaker and more likely to rupture.