Blood pressure is the force of your blood on the walls of your blood vessels. It is written as systolic/diastolic e.g. 120/80.

Systolic blood pressure is the pressure in your arteries when your heart contracts and pushes the blood around your body. Diastolic blood pressure is the pressure in the arteries when your heart relaxes and refills with blood between heartbeats.

High blood pressure increases your risk of developing cardiovascular diseases, such as stroke.