Skip to main content
    Health Library

    Heart health · 4 min read · Evidence-informed guide

    High Blood Pressure: When Is It an Emergency?

    A reading higher than 180/120 mm Hg should be repeated after at least one minute. If it remains that high and you have chest pain, shortness of breath, back pain, numbness, weakness, vision changes, or trouble speaking, call 911 immediately.

    Key answer

    The short version

    A reading higher than 180/120 mm Hg should be repeated after at least one minute. If it remains that high and you have chest pain, shortness of breath, back pain, numbness, weakness, vision changes, or trouble speaking, call 911 immediately.

    A number and symptoms both matter

    The American Heart Association describes readings higher than 180/120 mm Hg as severe. With symptoms of possible organ damage, this is a hypertensive emergency and requires 911.

    If there are no emergency symptoms

    If a repeat reading remains higher than 180/120 mm Hg without the listed emergency symptoms, contact your health care professional as soon as possible for individualized guidance. Do not take extra medicine or change doses unless directed.

    Use routine care for prevention

    Regular measurement, medication review, and a plan you can follow are the best way to address high blood pressure before a crisis. A primary-care visit can help evaluate trends and barriers to treatment.

    Clinical perspective

    How to think about this

    Very high blood pressure should never be dismissed, but the immediate response depends on both the repeat measurement and symptoms. Emergency symptoms signal a need for 911; changing medication on one’s own can be unsafe.

    Questions worth bringing to a visit

    • What should I do if a home reading is much higher than usual?
    • Which symptoms mean I should call 911?
    • Who should I contact after a concerning but non-emergency reading?

    Continue exploring

    Related patient questions

    Understanding Blood Pressure ReadingsRead article How to Start a Conversation About Cholesterol ResultsRead article Early Signs of Heart Disease: When to Seek HelpRead article

    Sources

    1. 1. American Heart Association, When to Call 911 About High Blood Pressure

      Severe hypertension and hypertensive-emergency action guidance.

    2. 2. American Heart Association, High Blood Pressure

      Blood-pressure education and ongoing-care context.