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What Is High Blood Pressure?
Blood pressure is the force of blood pushing against the walls of your arteries as your heart pumps. It's measured with two numbers — for example, 120/80. The top number (systolic) measures pressure when your heart beats; the bottom number (diastolic) measures pressure between beats.
High blood pressure — or hypertension — means the force is consistently too high. Over time, this damages artery walls, forces the heart to work harder, and can lead to heart attack, stroke, kidney disease, and heart failure.
Blood pressure categories (American Heart Association):
Normal: Less than 120/80 mmHg
Elevated: 120–129 / less than 80
High (Stage 1): 130–139 / 80–89
High (Stage 2): 140+ / 90+
Crisis: 180+ / 120+ — seek emergency care immediately
About 1 in 2 American adults has high blood pressure. Most don't know it. That's why regular checkups matter so much.
Symptoms
This is what makes hypertension so dangerous: most people feel completely normal. There are usually no warning signs until significant damage has already occurred.
In rare cases of very high blood pressure (hypertensive crisis), people may experience:
- Severe headache
- Blurred or double vision
- Nosebleeds
- Shortness of breath
- Chest pain
- Dizziness or lightheadedness
The absence of symptoms does not mean your blood pressure is fine. The only way to know is to measure it. Get it checked regularly — at least once a year if you're healthy, more often if you have risk factors.
How Is It Diagnosed?
Diagnosis is straightforward: a blood pressure cuff reading. But one high reading doesn't automatically mean hypertension — blood pressure naturally varies throughout the day based on activity, stress, and other factors.
Your doctor will typically:
- Take multiple readings on separate visits before diagnosing hypertension
- Ask about your medical history, family history, and lifestyle
- Order blood and urine tests to check kidney function, cholesterol, and blood sugar
- Order an EKG to check if the heart has been affected
- Sometimes recommend home blood pressure monitoring
In a small percentage of cases, high blood pressure has an underlying cause (like kidney disease or a hormonal disorder). Your doctor may investigate these if your hypertension is severe or hard to control.
⚠️ CRITICAL: Blood Pressure Is NOT Static — We Care About the RUNNING AVERAGE
Your blood pressure changes second by second — based on activity, stress, anxiety, time of day, what you ate, and even room temperature. One reading means nothing. What matters is the RUNNING AVERAGE over 12 weeks.
Example: Week 1 you measure 142. Don't panic. That's just one number. Week 2 you measure 132. Don't celebrate. That's just one number. After 12 weeks, you average all 12 measurements and get 135. THAT'S your blood pressure. THAT'S what we use to make treatment decisions.
📋 How to Check Your Blood Pressure Correctly
Step 1: Timing & Frequency
- No more than 1-2 times per week — Checking daily creates noise and confusion
- Pick the same day each week — Example: Saturday morning
- Same time of day — Morning readings are typically lower and more consistent
Step 2: Position & Environment
- Sit in a chair with your back supported
- Feet flat on the floor — Not dangling, not crossed
- Legs uncrossed — Crossed legs can artificially elevate BP
- Arm at heart level — Rest your arm on a table or armrest
- No talking or distractions — Phone away, TV off
Step 3: Rest & Calm Down
- Sit quietly for 5 minutes BEFORE measuring — Let your body settle
- No exercise, coffee, or smoking in the 30 minutes before measurement
- Empty your bladder first — Full bladder can raise BP
- Breathe slowly and calmly — Anxiety raises BP temporarily
Step 4: Take 3 Readings Over 5 Minutes
- Take your first reading
- Wait 1-2 minutes
- Take your second reading
- Wait 1-2 minutes
- Take your third reading
💚 Why 3 readings? The first reading is often elevated from anticipation and activity. By the third reading, you're truly at rest. Taking 3 gives us the real picture.
Step 5: Write Down the LOWEST Systolic Number
The systolic number is the first (top) number. Example: In 136/84, the systolic is 136.
- Reading 1: 142/88 — Systolic = 142
- Reading 2: 138/85 — Systolic = 138
- Reading 3: 136/83 — Systolic = 136 ✓ WRITE THIS ONE DOWN
Record: 136 (the lowest systolic)
Don't just average them — record the lowest. Your true resting BP is what it becomes after you've fully relaxed.
Step 6: Track Over 12 Weeks (12 Readings) — Build Your Running Average
1 reading per week × 12 weeks = 12 data points for your running average
📋 Download: BP Log Template
Use this printable or digital BP log to track your readings over 12 weeks. Print it out or keep it on your phone.
📥 Download BP Log (PDF)| Week | Date | Your Lowest Systolic | Running Average | Notes |
| 1 | 4/19 | 136 | 136 | After exercise |
| 2 | 4/26 | 132 | 134 | Normal rest |
| 3 | 5/3 | 129 | 132.3 | Trending down ✓ |
| 4 | 5/10 | 131 | 132 | Stable |
| ... continue for weeks 5-12 ... | ||||
| After 12 weeks | — | — | AVG: 131 | Your TRUE BP |
💚 The Running Average Matters: Notice how week 1 was 136, but your 12-week average is 131. Individual fluctuations don't matter. The trend does. This is your true baseline blood pressure.
⚠️ Key Point: Don't panic over one high reading. Keep tracking. If your running average over 12 weeks is trending up, THEN we talk to your doctor. If it's stable or trending down, you're on the right track.
🚨 Remember: BP Changes Every Second — We Care About the RUNNING AVERAGE
Your blood pressure is NOT one number. It's constantly changing based on:
- Time of day (lower in morning, higher in evening)
- What you just ate (salt, caffeine, sugar)
- Whether you just exercised
- Your stress level RIGHT NOW
- Your anxiety about the measurement
- Room temperature
- Even your posture
We Do NOT Care About Single Numbers
One high reading? Doesn't mean anything. You might have been stressed, just exercised, or anxious. One low reading? Nice, but doesn't tell us your baseline.
We care about the RUNNING AVERAGE. Over 12 weeks, we average all 12 readings. THAT'S your true blood pressure. THAT'S what determines if you need treatment or if your treatment is working.
This is WHY one reading is useless. This is WHY we need 12 weeks of data. This is WHY white coat hypertension exists (high BP at the doctor's office, normal at home).
The TREND and the RUNNING AVERAGE are what matter. Not panic over one number.
📱 Use Our App to Track
Don't want to keep a notebook? Use our Virtual Cardiology app to log your BP readings. The app tracks your systolic, diastolic, and trends over time. Bring it to your doctor appointment — the data is right there.
Treatment Options
The good news: high blood pressure is very treatable. Most people can get it under control with a combination of lifestyle changes and medication.
Lifestyle Changes
These can lower blood pressure significantly — sometimes enough to avoid medication:
- Reduce sodium: Aim for less than 2,300 mg/day (ideally 1,500 mg). Processed foods are the biggest culprit.
- DASH diet: Rich in fruits, vegetables, whole grains, and low-fat dairy — proven to lower blood pressure.
- Exercise regularly: 30 minutes of moderate activity most days can lower systolic blood pressure by 5–8 mmHg.
- Limit alcohol: No more than 1 drink/day for women, 2 for men.
- Quit smoking: Each cigarette temporarily spikes blood pressure and damages blood vessels.
- Manage stress: Chronic stress contributes to hypertension. Mindfulness, sleep, and exercise all help.
- Lose weight if needed: Even a 10-pound loss can meaningfully reduce blood pressure.
Medications
When lifestyle changes aren't enough, medications are safe, effective, and widely used. Common classes include:
- ACE inhibitors / ARBs (e.g., lisinopril, losartan) — relax blood vessels; often first-line
- Calcium channel blockers (e.g., amlodipine) — relax artery walls
- Thiazide diuretics (e.g., hydrochlorothiazide) — reduce fluid volume
- Beta-blockers (e.g., metoprolol) — slow the heart rate and reduce output
Many people need more than one medication. That's completely normal and doesn't mean your case is severe.
📺 Video Resources
Watch Dr. Pollock explain high blood pressure, why it matters, and how to manage it effectively.
When to Seek Care
- You've never had your blood pressure checked
- Home readings are consistently above 130/80 over several weeks
- You notice a sudden increase in your readings (trending upward)
- You're having trouble tolerating your current medications
- You experience chest pain, severe headache, or difficulty breathing (call 911)
Don't stop medications without talking to your doctor first. And remember: one high reading doesn't mean anything. It's the trend that matters. If one reading is high but your trend is stable, stay calm and continue tracking.