Nearly one out of three Americans has high blood pressure, a leading factor in heart disease, stroke, and other health problems. But because there are usually no symptoms, you can have high blood pressure and not know it. A simple blood pressure test will tell you if you need to bring your number down.

Keep in mind that one high reading doesn’t necessarily mean you have high blood pressure. But if your number stays high over time, your doctor will recommend treating it. Lifestyle changes such as being more active, losing weight, quitting smoking, and managing stress can help lower blood pressure.

Getting yours checked doesn’t require an office visit. Many walk-in “retail” clinics and pharmacies offer blood pressure testing.