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Blood pressure of 180/120 millimeters of mercury or higher.

A hypertensive crisis needs medical help right away. The very high blood pressure can cause a heart attack or stroke. It also can damage the eyes, brain and kidneys.

Symptoms may include chest pain, a very bad headache, blurry vision, upset stomach and vomiting. Some people may feel confused or have seizures.

Medical care is needed right away. Medicines are used to lower blood pressure. Treatment also may include a hospital stay to watch for organ damage.