How do I know if I have high blood pressure?

The only reliable way to know if you have high blood pressure is to have it measured with a blood pressure cuff. High blood pressure typically has no symptoms, which is why it's called the "silent killer." You can get your blood pressure checked at a doctor's office, pharmacy, or using a home blood pressure monitor. A normal reading is below 120/80 mmHg. High blood pressure is generally defined as 130/80 mmHg or higher. Because readings can vary, doctors usually confirm a diagnosis over multiple measurements. If you haven't had your blood pressure checked recently, it's a good idea to see a healthcare provider, especially if you have risk factors like obesity, a family history, or you're over 40.