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How to Prevent High Blood Pressure

Source: MedlinePlus Health Topics, U.S. National Library of Medicine

Last synced 8/15/2026Status: primary verified

Around half of American adults have high blood pressure (hypertension). Many of those people don't know they have it because there are usually no warning signs. This can be dangerous, because high blood pressure can lead to life-threatening conditions like heart attack or stroke . The good news is that you can often prevent or treat high blood pressure. Early diagnosis and heart-healthy lifestyle changes can keep high blood pressure from seriously damaging your health. What is blood pressure? Each time your heart beats, it pumps blood into your arteries (the blood vessels that carry blood from your heart to the tissues and organs in your body). Blood pressure is the force of your blood pushing against the walls of your arteries. Blood pressure is measured as two numbers: Systolic pressure (the first and higher number) measures pressure inside your arteries when your heart beats Diastolic pressure (the second and lower number) measures the pressure inside your arteries when your heart rests between beats As an example, a blood pressure reading of 120/80 means a systolic of 120 and a diastolic of 80. How is high blood pressure diagnosed? High blood pressure usually has no symptoms. So the only way to find out if you have it is to get regular blood pressure checks from your health care provider. Your provider will use a gauge, a stethoscope or electronic sensor, and a blood pressure cuff. They will take two or more readings at separate appointments before making a diagnosis: Blood Pressure Category Systolic Blood Pressure Diastolic Blood Pressure Normal Less than 120 and Less than 80 Elevated 120 - 129 and Less than 80 High Blood Pressure Stage 1 130 - 139 or 80 - 89 High Blood Pressure Stage 2 140 or higher or 90 or higher Hypertensive Crisis (dangerously high blood pressure - seek medical care right away) Higher than 180 and Higher than 120 For children and teens, the provider compares the blood pressure reading to what is normal for other kids who are the same age,

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This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.