High blood pressure (sometimes called hypertension) is very common and doesn’t often have many symptoms. 

Knowing you have high blood pressure and making small lifestyle changes can help prevent life-threatening complications like heart attack and stroke. This is why regular blood pressure testing for anyone age 40 and over is so important. 
When you have your blood pressure measured, the reading is written as two numbers. The first is when the pressure is at its highest (systolic), and the second at its lowest (diastolic).