Have a medical question and want an honest answer from a doctor? Dr. Mara Gordon, a family physician from Camden, N.J., tackles reader health inquiries each month. Feel free to write to us at: thrive@npr.org.
Question: I had a high blood pressure reading during my annual check-up, but my doctor didn’t prescribe medication. What steps can I take? Should I check my blood pressure at home?
Hypertension is often referred to as the “silent killer,” as it can lead to serious health issues while many with high blood pressure feel completely fine.
This can be alarming. Untreated hypertension increases the chances of experiencing heart attacks, strokes, or kidney problems. It’s very common, affecting around 31% of adults globally. Many patients are unaware they have this serious condition until they visit their doctor for a routine check-up.
That’s why regular blood pressure checks are crucial. The U.S. Preventive Services Task Force suggests that all adults over 18 should undergo screening for hypertension. While there’s no strict frequency mentioned, it’s generally advised for those over 40 to be checked at least once a year.
Interestingly, measuring your blood pressure at a doctor’s office isn’t always the best method for diagnosing hypertension, which can be more complex than it seems.
Understanding Hypertension’s Diagnosis
In-office measurements are helpful for screening those at risk, but true diagnosis depends on multiple high readings, rather than just one instance. Blood pressure varies throughout the day, which is perfectly normal.
Dr. Ryan McCormick, a New Jersey family doctor, points out that “blood pressures are quite dynamic.” They fluctuate frequently, even within the same day.
When you visit a doctor or the emergency room, stress can lead to elevated readings, which is a common physiological response. This is often referred to as white coat hypertension—where the doctor’s presence raises your anxiety and, consequently, your blood pressure. While individuals with this phenomenon may be at greater risk for true hypertension, the two conditions are not synonymous.
This situation might explain why your doctor did not prescribe medication right away after finding an elevated reading; that single measurement doesn’t provide enough information for a definitive diagnosis.
Home Monitoring
Checking your blood pressure at home can provide additional insights beyond a one-time reading during an annual visit.
You don’t necessarily need to buy a blood pressure cuff, but if your recent readings have been high or borderline, it might be worthwhile to track it at home periodically.
As indicated by the American College of Cardiology in their updated 2025 guidelines, home measurements can enhance the accuracy of detecting your true blood pressure levels.
Dr. McCormick suggests that if a patient presents with a high reading in his office, he often advises them to monitor their blood pressure at home several times a week. When they come back for a follow-up, they review the collected data together and determine the next steps.
“That’s the advantage of continuity as a family doctor,” he remarked, noting the benefits of home monitoring.
Ensuring Accuracy
Whether measured at a doctor’s office or at home, technique is vital for accurate blood pressure readings. For instance, using a cuff that’s too small can result in a significant discrepancy, nearly 20 points off on systolic readings.
The American Heart Association has outlined steps to ensure your readings are precise. They recommend avoiding caffeine, exercise, or smoking for at least half an hour before checking blood pressure. Plus, make sure to empty your bladder, as a full one can elevate your results.
Sitting quietly for about five minutes before the test is also crucial. This is a common mistake—patients often arrive rushed and haven’t had time to settle down. Ideally, you should be seated comfortably, feet flat on the floor, back supported, and keep conversations to a minimum during the measurement.
Choosing the Right Cuff
If you decide to purchase a home blood pressure cuff, there’s a wide range available. Several models from companies like Omron and Microlife have been validated in studies. If you’re unsure which one to pick, it could be helpful to ask your doctor.
It’s essential to select the right size cuff—a challenge for some. The recommendation is that the cuff bladder should be 75% to 100% of your arm’s circumference, wrapping around your upper arm comfortably.
When it comes to taking measurements, ensure your arm is elevated to heart level, and avoid using wrist cuffs, as they do not provide accurate readings. Also, techniques claiming to measure blood pressure without cuffs—like for example those using a smartwatch—are not currently deemed reliable by medical professionals.
When to Consider Medication
In recent years, the definition of hypertension has been refined. This shift is largely based on new research showing that lower blood pressure targets can prevent severe cardiovascular events.
- Normal blood pressure: Below 120/80
- Elevated reading: 120-129/80
- Hypertension: 130/80 or above
If a patient has multiple readings in the hypertension range over a month, I typically suggest starting medication with the target to drop their blood pressure below 130/80.
Sometimes a new patient might present with just one extremely high reading. In such cases, I’ll ensure accurate technique before deciding whether to prescribe medication. If I’m confident that the reading indicates true hypertension, I may prescribe right away—especially if there’s a concern about the patient returning for future checks.
If you’re consistently reading above 130/80 at home, that’s a good reason to consult a physician regarding treatment options.
Treatment Goals Vary with Age
In older patients, treatment might be less aggressive. Many practitioners suggest maintaining slightly higher blood pressure values in older adults, a stance backed by guidelines from respected organizations.
The reasoning is that the side effects of aggressive treatment can outweigh the benefits. Blood pressure medications might cause lightheadedness, a concern especially in the elderly, where it can lead to falls and serious injuries.
Also, these medications can lead to electrolyte imbalances, posing greater risks for older individuals. While the advantages of managing hypertension build over time, they can be less immediate for older patients who may have fewer years ahead.
Focus on Prevention
Regular physical activity and reducing alcohol consumption can significantly lower your risk for developing hypertension.
As Dr. McCormick points out, numerous factors influence hypertension, including mental health, stress, diet, and exercise.
When focusing on diet, the DASH eating plan, rich in fruits, vegetables, fibers, and whole grains, is scientifically supported and effective. While cutting down on sodium can help, there’s no need to eliminate all salt, as that can backfire, making food less palatable. Instead, try minimizing processed foods and enjoy cooking with fresh ingredients.
Managing stress is crucial, although that’s often easier said than done. Some techniques, such as transcendental meditation and yoga, are endorsed by the American College of Cardiology for proactive stress relief.
But if you find yourself diagnosed with hypertension despite all these efforts—don’t be too hard on yourself. Genetic factors play a strong role in hypertension, and medications are essential for reaching healthy blood pressure levels.
