Scary Symptoms You Can Relax About

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Don't worry about: A single elevated blood-pressure reading

The human body is constantly changing in response to an array of factors: stress, medications, what you eat, how you sleep. This is definitely true of blood pressure, particularly the top number in the blood-pressure measurement, the systolic blood pressure. In fact, there is a phenomenon called "white coat hypertension," in which blood pressure goes up when the measurement is taken at the doctor's office because you're nervous about having it checked! A friend of mine was recently in the hospital, hooked up to a display that checked his blood pressure every 15 minutes, with tremendous variation. It nearly drove him crazy.

Next: When to worry about blood pressure