High blood pressure doesn’t happen overnight. For many people, it begins with a stage known as prehypertension. This is when blood pressure is higher than normal but not yet in the range considered high. Left unchecked, prehypertension can progress to hypertension (high blood pressure), which increases the risk of heart disease, stroke, and kidney problems.
The good news is that with the right lifestyle habits and regular monitoring, you can manage prehypertension and reduce your long-term health risks.
What Is Prehypertension?
Blood pressure is measured with two numbers:
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Systolic pressure (the top number) – pressure when the heart beats
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Diastolic pressure (the bottom number) – pressure when the heart relaxes
Normal blood pressure is usually considered below 120/80 mmHg. Prehypertension generally means:
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Systolic: 120–139 mmHg
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Diastolic: 80–89 mmHg
While this range doesn’t mean you have high blood pressure yet, it signals that your body is under strain and you may need to make changes.
Why Prehypertension Matters
Prehypertension is a warning sign. If ignored, it can progress to full hypertension, which significantly increases your risk of:
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Heart attack
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Stroke
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Kidney disease
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Vision problems
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Other cardiovascular complications
By paying attention early, you can take steps to slow down or even prevent progression.
Causes and Risk Factors
Prehypertension can happen for many reasons. Some are related to lifestyle, while others may be linked to genetics or underlying health issues.