Blood pressure (BP) is measured in millimeters of mercury (mmHg). In blood pressure readings, the top number represents systolic BP, the pressure during a heartbeat, while the bottom number represents the diastolic BP, the pressure between heartbeats.

High blood pressure is considered anything above the normal level of 120/80 mmHg, said Rose Cheung, the California-based co-author of “Healing Herbal Soups: Boost Your Immunity and Weather the Seasons with Traditional Chinese Recipes.”

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