What blood pressure reading is dangerously high?

A blood pressure of 180/120 mmHg or higher is a hypertensive crisis. With symptoms (severe headache, vision changes, chest pain), call 911 immediately. Without symptoms, contact your doctor or go to urgent care the same day. Stage 2 hypertension (140-179/90-119) requires medical management but is not typically an emergency.

Can lifestyle changes alone control high blood pressure without medication?

Lifestyle changes can lower blood pressure by 10-20 mmHg. The most effective: DASH diet (8-14 mmHg reduction), sodium restriction below 2,300 mg/day (5-6 mmHg), regular aerobic exercise (4-9 mmHg), and weight loss (1 mmHg per kg lost). For Stage 1 hypertension in lower-risk individuals, lifestyle changes alone may be sufficient. Stage 2 hypertension typically requires medication alongside lifestyle changes.

Why is my blood pressure higher at the doctor than at home?

White coat hypertension — elevated blood pressure in medical settings due to anxiety — affects 15-30% of patients. Home monitoring is more representative of true blood pressure. Sit quietly 5 minutes before measuring, take 2 readings 1 minute apart, and record both. True hypertension is elevated both in the office and at home.

What is the new blood pressure guideline threshold — is 130/80 really considered high?

The 2017 ACC/AHA guideline defines hypertension as 130/80 mmHg or higher. Stage 1 (130-139/80-89) does not automatically require medication — treatment depends on your 10-year cardiovascular risk. For lower-risk individuals, lifestyle changes are tried first. Those with diabetes, kidney disease, or prior cardiovascular events are typically treated at 130/80.

Does anxiety or stress cause high blood pressure?

Acute stress causes temporary blood pressure spikes but does not cause chronic hypertension. However, chronic psychological stress that leads to unhealthy behaviors (poor diet, inactivity, poor sleep) contributes to sustained hypertension. Sleep deprivation is an independent risk factor. Managing stress improves blood pressure indirectly.

What are the best blood pressure medications and their side effects?

First-line medications: ACE inhibitors (lisinopril) — preferred in diabetes and kidney disease, may cause dry cough in 10-15%; ARBs (losartan) — equivalent to ACE inhibitors without the cough; calcium channel blockers (amlodipine) — effective for systolic hypertension; thiazide diuretics (chlorthalidone) — inexpensive and effective. Most Stage 2 hypertension requires combination therapy.

How much does reducing sodium intake lower blood pressure?

Reducing sodium from 3,400 mg/day to 2,300 mg/day lowers systolic blood pressure by 2-4 mmHg. Reducing to 1,500 mg/day lowers it by 5-6 mmHg. Processed and restaurant foods account for over 70% of sodium intake. Reading nutrition labels and choosing low-sodium options is more impactful than avoiding the salt shaker.

Why is blood pressure higher in the morning?

Blood pressure naturally surges in early morning (6-10 AM) as cortisol and adrenaline rise. An exaggerated morning surge increases cardiovascular risk — most heart attacks occur between 6 AM and noon. Long-acting medications taken at bedtime or once daily help blunt this surge. Morning readings before medication give the best assessment of blood pressure control.

How often should I check my blood pressure at home?

For established hypertension: twice daily for one week before each medical appointment, then weekly once controlled. After medication changes: daily for the first month, then weekly. Use a validated upper-arm cuff. Sit quietly 5 minutes before measuring, take 2 readings 1 minute apart, and record the average.

Can high blood pressure cause symptoms, or is it truly silent?

Hypertension is called "the silent killer" because most people have no symptoms at typical elevations. At very high levels above 180/120 mmHg, some people develop headache, nosebleed, visual changes, or shortness of breath. The danger is cumulative damage to the heart, arteries, brain, kidneys, and eyes over decades of uncontrolled blood pressure.

Español

Blood pressure check · no login

What does your blood pressure reading mean?

Enter your reading. See its category and what to do first.

Check my reading Questions for your doctor

Seeing a clinician soon? Make a one-page sheet from your home log and practice what to say →

Stroke signs (B.E. F.A.S.T.) and a clock for when they started →

Blood pressure check-in

Enter your reading and get your AHA category with a clear next step.

Based on American Heart Association guidelines. This is a guide, not a diagnosis.

Blood Pressure in 15 seconds

Text version:

The cuff reads 142 over 91. What does it mean, and what should you do first?
Two numbers, one AHA category. 142/91 is Stage 2: a doctor visit within days, not weeks.
One reading is not a diagnosis. Log a week, morning and evening. It stays in this browser.
Enter your own reading. See your step. 180/120+ with chest pain, trouble breathing, weakness or trouble speaking: call 911 now.
Blood Pressure. What your numbers mean, and what to do next. bloodpressure.help

What your numbers mean

Blood pressure is measured as two numbers. Both matter. Here is what the American Heart Association categories mean for your health.

Normal

Below 120 / Below 80 mmHg

Blood vessels are under healthy mechanical load. Keep doing what you are doing. Recheck once a year.

Prevention and annual monitoring

Elevated

120-129 systolic / Below 80 mmHg

Not yet hypertension, but a signal. Blood pressure tends to progress without intervention. Lifestyle changes now can prevent Stage 1.

Sodium reduction, exercise, weight management

Stage 1 hypertension

130-139 / 80-89 mmHg

Increased risk of heart disease and stroke. Lifestyle changes are the first-line treatment. Medication may be recommended if you have other risk factors.

Doctor visit + DASH diet + exercise program

Stage 2 hypertension

140+ systolic / 90+ diastolic mmHg

Sustained high pressure damages arteries, kidneys, and the heart. Medication is typically recommended alongside lifestyle changes.

Doctor visit within days, not weeks

Hypertensive crisis

180+ / 120+ mmHg

Very high. Pressure this high can damage blood vessels, the brain, heart and kidneys. Sit quietly for 5 minutes and check again.

Chest pain, trouble breathing, weakness, numbness, vision change or trouble speaking: call 911 now. No symptoms but still this high: call your doctor right away or go to urgent care.

Why home monitoring matters

Daily readings are more reliable than a single office reading

White coat hypertension (elevated only at the doctor's office) affects 15-30% of patients. Masked hypertension (normal at office, elevated at home) is just as common and more dangerous.

Measure at the same time daily — morning before medication

What actually moves blood pressure — by how much

These reductions are from randomized controlled trials, not population estimates. For Stage 1 hypertension, combining all five lifestyle changes can match the effect of a single medication.

Sources: DASH Trial (NEJM 1997); DASH-Sodium Trial (NEJM 2001); ENCORE Trial; JNC-8; AHA Lifestyle Statement 2021.

DASH diet

8–14 mmHg

High fruits, vegetables, whole grains, low-fat dairy. Low in saturated fat and red meat. Sodium under 2,300 mg/day.

DASH Trial, NEJM 1997

Sodium reduction

2–8 mmHg

From 3,400 mg (US average) to 1,500 mg/day. Most sodium is in processed foods — not the salt shaker.

DASH-Sodium Trial, NEJM 2001

Aerobic exercise

4–9 mmHg

150 minutes/week moderate intensity (brisk walk, cycling). Effect appears within 4 weeks. Resistance training adds another 2–4 mmHg.

AHA Physical Activity Guideline 2018

Weight loss

~1 mmHg per kg

Each kilogram (~2.2 lbs) of body weight lost lowers systolic pressure by approximately 1 mmHg. Most effective when combined with DASH diet.

PREMIER Trial; AHA Obesity and Hypertension Statement

Alcohol reduction

2–4 mmHg

Reducing from moderate to minimal drinking. Limit: no more than 1 drink/day for women, 2 for men. Heavy drinking is a significant and reversible BP driver.

Cochrane Review: Alcohol and BP 2020

Potassium increase

3–5 mmHg

Target 3,500–5,000 mg/day from food (bananas, spinach, sweet potato, white beans). Counteracts sodium's effect on blood vessels. Ask your doctor before supplementing if you have kidney disease.

Whelton PK et al., JAMA 1997

Where sodium actually hides

The average American consumes 3,400 mg of sodium daily — more than double the 1,500 mg optimal target. Only 11% comes from the salt shaker. The rest is already in food when you buy it.

Bread and rolls

The single largest sodium source in the American diet. One slice of white bread contains 150–200 mg. Most Americans eat 6+ slices worth per day in various forms.

Pizza

A single slice of restaurant pizza typically contains 500–900 mg. At two slices, you have consumed 40–75% of the daily target in one meal.

Cold cuts and cured meats

Three slices of deli turkey contain ~700 mg. Sodium acts as a preservative, so virtually all processed meats are high regardless of brand.

Canned and packaged soups

One cup of canned soup averages 800–1,200 mg. 'Reduced sodium' versions typically still contain 400–600 mg. Rinse canned beans, which cuts sodium by 40%.

Restaurant entrees

A single restaurant meal frequently exceeds 2,000 mg — your entire daily target. Chain restaurants are required to post sodium counts; use them.

Cheese

One ounce of American processed cheese contains ~400 mg. Swiss and fresh mozzarella are lower-sodium alternatives.

Source: Centers for Disease Control and Prevention — Sodium and the Dietary Guidelines, 2023.

Find the salt: read a food label in 10 seconds →

How much does sodium reduction actually move blood pressure?

Drag the slider to model your estimated systolic reduction — based on the DASH-Sodium Trial, one of the best-controlled randomized studies on diet and blood pressure.

Source: Sacks FM et al., NEJM 2001 (DASH-Sodium Trial). Estimates reflect group averages from the trial; individual responses vary. This is not a medical prediction.

Daily sodium intake

3,400mg

Estimated systolic reduction

0mmHg

1,500 mg (optimal)3,400 mg (US average)

US average

At the US average intake, sodium alone contributes meaningfully to elevated blood pressure in salt-sensitive individuals. Most of this sodium is already in packaged and restaurant food before you add any salt.

Quick set:

What this means in practice: A 5–6 mmHg systolic reduction is roughly equivalent to a low-dose diuretic — without the medication. The DASH-Sodium Trial demonstrated that dietary sodium reduction works in both hypertensive and normotensive individuals, and the effect is additive with the full DASH diet. For people with Stage 1 hypertension, combining sodium reduction with the DASH diet, aerobic exercise, and weight management can match the effect of a single antihypertensive medication.

See where you land

Your reading on the AHA category map

Two numbers, two axes. Watch your reading land on the chart and see exactly which category it falls into — and why. It only takes one of the two numbers to move you up a stage.

Systolic (top number)

Diastolic (bottom number) →

NormalElevatedStage 1Stage 2Crisis

Enter a reading to plot it

Systolic

Diastolic

Categories follow the 2017 AHA/ACC guideline; the 2025 guideline kept the same cut points. A single reading is not a diagnosis — blood pressure is best assessed as an average of several readings taken at rest, on different days. This tool is educational and does not replace a clinician's evaluation. Readings stay in your browser and are never saved or sent; the page only counts the visit.

Take your readings to your next visit

When blood pressure won't budge: the hidden drivers

Resistant hypertension — blood pressure that stays above goal on three or more medications — affects roughly 12–15% of people with hypertension. Before adding a fourth drug, these reversible causes should be ruled out.

Obstructive sleep apnea

Very common — underdiagnosed

Sleep apnea is the most common identifiable cause of resistant hypertension. When breathing repeatedly stops during sleep, the body surges with adrenaline — raising blood pressure throughout the night and into the morning. CPAP therapy can reduce systolic pressure by 5–10 mmHg in people with significant sleep apnea. Ask about a sleep study if you snore, wake unrefreshed, or have been told you stop breathing at night.

Logan AG et al., J Hypertension 2001; JAMA Internal Medicine 2014

NSAIDs and common medications

Reversible if identified

Ibuprofen (Advil, Motrin), naproxen (Aleve), and other NSAIDs cause sodium retention and blunt the effect of antihypertensives. Regular use of these over-the-counter pain relievers can raise systolic BP by 3–5 mmHg and is a common reason controlled hypertension becomes uncontrolled. Other culprits include decongestants (pseudoephedrine), oral contraceptives, stimulants, and some antidepressants. Review all medications — prescription and over-the-counter — with your doctor.

Snowden S et al., Lancet 2002; ACC Resistant Hypertension Statement

Primary aldosteronism

Often missed — ask about testing

Overproduction of aldosterone — a hormone from the adrenal glands — causes sodium retention and is present in 5–12% of hypertensive patients referred to specialists, much higher than previously thought. It often presents as hypokalemia (low potassium) alongside high blood pressure. Diagnosed with a simple aldosterone-to-renin ratio blood test. When caused by a single adrenal adenoma, surgical removal can cure hypertension entirely.

Funder JW et al., J Clin Endocrinol Metab 2016 (Endocrine Society Guideline)

Kidney disease

Bidirectional relationship

The kidneys regulate blood pressure through fluid balance and hormone production. Chronic kidney disease (CKD) both causes and is worsened by hypertension — the relationship runs both ways. ACE inhibitors and ARBs are particularly protective for kidney function in CKD, but dose adjustments are required as kidney function declines. Measuring creatinine and eGFR annually is standard monitoring in hypertension.

Whelton PK et al., ACC/AHA 2017 Guideline

White coat and masked hypertension

Can mimic or hide true hypertension

White coat hypertension — elevated in the office, normal at home — affects 15–30% of diagnosed patients and may not require treatment. Masked hypertension — normal in the office, elevated at home — is equally common and more dangerous because it goes undetected. 24-hour ambulatory blood pressure monitoring or systematic home monitoring distinguishes them. A home average above 135/85 mmHg is considered hypertensive.

Pickering TG et al., Hypertension 2005; ESH 2023 Guideline

Non-adherence to medication

Most common missed diagnosis

The most common cause of 'resistant' hypertension is not actually pharmacological — it is inconsistent medication taking. Pharmacokinetic testing (measuring drug levels in blood or urine) in resistant hypertension cohorts finds that 50–60% of patients have little or no detectable medication in their system. Simplifying regimens to once-daily combinations, pill organizers, and linking medication to a daily habit (meals, toothbrushing) are the most effective adherence interventions.

Ceral J et al., J Hum Hypertension 2011; ACC Resistant Hypertension Consensus 2018

Ask your doctor whether any of these apply to you

Sample patient — Maria, 58

What 7 days of tracking actually tells you

This is what a week of blood pressure readings can look like. Read the pattern, then start your own below.

7-day average

140/90 mmHg

Stage 2 hypertension

Daily systolic trend

110–160 mmHg

MonTueWedThuFriSatSun

Day	Morning	Evening	Stage
Mon Apr 7	142/91	138/88	Stage 2
Tue Apr 8	145/93	140/89	Stage 2
Wed Apr 9	139/89	136/86	Stage 1
Thu Apr 10	144/92	141/90	Stage 2
Fri Apr 11	147/94	143/91	Stage 2
Sat Apr 12	138/87	135/85	Stage 1
Sun Apr 13	141/90	137/88	Stage 2

Start your own log

Add your first reading and this log switches from Maria's sample to yours.

A single high reading is common — one reading is not a diagnosis, and your week's average is what your clinician acts on. A family member or caregiver can also keep this log with you on one device.

Seeing a clinician soon? The visit sheet reads this same browser log and lets you practice the conversation.

Open the one-page visit sheet (/visit) →

What this pattern shows

1.Sustained Stage 2 hypertension. 7-day average of 140/90 sits above the 140/90 threshold — this isn't white-coat spike, it's a real pattern that needs treatment.
2.Morning surge of 3 mmHg. Mornings (142) run higher than evenings (139). Classic AM cortisol pattern — timing medication for early morning may help.
3.Weekend dip. Sat/Sun trend lower — points to work-related stress as a modifiable factor worth raising with your physician.

May qualify for remote monitoring

A pattern like Maria's may qualify for Remote Physiologic Monitoring (CPT 99453-99458) — a Medicare program where your doctor's practice can review your home BP readings and adjust care between visits. It needs your clinician to order it. Whether your plan covers it depends on the plan: ask the practice.

Ask your doctor about it

Sample data for education. Readings you add are stored only in this browser.

Before you write a number down

Measure it right: the steps and the cuff size

A cuff that is the wrong size, an arm hanging down or a chat during the reading can each move the number. Tick each step as you do it. Nothing here is saved.

Which cuff fits your arm

Measure around the bare upper arm, halfway between the tip of the shoulder and the elbow, with a soft tape (or a string, then a ruler).

Type your arm size to see the cuff band.

Cuff sizes by arm size (AHA statement, Table 3, 2019). Makers' ranges can differ a little.
Cuff	Arm size
Small adult	22 to 26 cm
Adult	27 to 34 cm
Large adult	35 to 44 cm
Extra-large adult	45 to 52 cm

An upper-arm monitor that has been checked for accuracy is what the statement recommends; the US listing of validated devices is linked below.

Sources: Muntner et al., Measurement of Blood Pressure in Humans, AHA scientific statement, Hypertension 2019; American Heart Association: Monitoring Your Blood Pressure at Home; US Blood Pressure Validated Device Listing (validatebp.org)

Confirm the number

Seven days at home, then what to do with the number

One reading is a snapshot. The American Heart Association and the American Medical Association describe how home blood pressure is assessed: a week of morning and evening readings, averaged. The home log above keeps any reading; this one follows that week step by step. Everything stays on this phone. This explains; your clinician decides.

1. Seven days of readings

Every morning and every evening, take two readings at least 1 minute apart.
Do it for 7 days: that is 28 readings. If you cannot, 3 days (12 readings) is the least.
The number is the average of all of them, not a glance at the highest or lowest.

Source: AHA/AMA joint policy statement on home blood pressure (Shimbo et al., Circulation 2020)

Before each reading

No smoking, caffeine or exercise in the 30 minutes before. Empty your bladder.
Sit quietly for 5 minutes. No talking, no phone.
Cuff on bare skin of the upper arm, arm resting on a table at heart level.

Source: American Heart Association: Monitoring Your Blood Pressure at Home

Which day?

Day	Morning	Evening
1	—	—
2	—	—
3	—	—
4	—	—
5	—	—
6	—	—
7	—	—

0 of 28 readings · 0 of 7 days

Your average shows here after your first saved reading.

2. What to do with this number

Type a reading, or tap “What to do with this average” above to use your week.

Sources: 2025 AHA/ACC high blood pressure guideline (Jones et al., Hypertension 2025); American Heart Association: Understanding Blood Pressure Readings

The categories: Normal below 120 and below 80; Elevated 120 to 129 and below 80; Stage 1 130 to 139 or 80 to 89; Stage 2 140 or higher or 90 or higher; if the two numbers fall in different categories, the higher one counts. Severe: higher than 180 and/or higher than 120. These are for adults who are not pregnant.

3. Lying down, then standing

In some people blood pressure drops on standing up (postural, or orthostatic, hypotension), which can bring on dizziness and falls. Clinicians check it this way:

Lie down for 5 minutes, then take a reading.
Stand up. Take a reading after 1 minute and again after 3 minutes.
A drop of 20 or more in the top number, or 10 or more in the bottom number, or feeling lightheaded or dizzy, is considered abnormal.

Sources: CDC STEADI: Measuring Orthostatic Blood Pressure; Freeman et al., consensus definition of orthostatic hypotension, Clin Auton Res 2011; CDC STEADI: Postural Hypotension, What It Is & How to Manage It

Stay safe while you stand

Have something sturdy to hold on to when you stand up, and someone beside you if you can.
Get up slowly: sit up first, sit on the side of the bed, then stand.
If you feel dizzy, sit or lie back down. Do not walk while dizzy.

Source: CDC STEADI: Postural Hypotension, What It Is & How to Manage It

Full blood pressure assessment

7 questions including lifestyle factors. Get your AHA category and a personalized plan.

Answer 7 quick questions (your reading from the check-in above is filled in for you) to get your AHA blood pressure category and personalized next steps. Takes about 2 minutes.

What you should know

Key risk factors, management strategies, and monitoring for high blood pressure.

Understanding Your Numbers

Normal is below 120/80 mmHg. Elevated is 120-129 systolic with diastolic below 80. Stage 1 hypertension is 130-139 systolic or 80-89 diastolic. Stage 2 is 140+ systolic or 90+ diastolic. A hypertensive crisis is 180/120 or higher and requires immediate emergency care.

Jump to →

The Silent Threat

High blood pressure usually has no symptoms. It silently damages blood vessels, heart, kidneys, and brain for years before problems appear. Regular monitoring is the only way to know your numbers.

Jump to →

Home Monitoring

Home blood pressure monitors are accurate and affordable. Measure at the same times daily, sitting quietly for 5 minutes first. Track your readings to share with your doctor and spot trends early.

Jump to →

Lifestyle Changes

Reducing sodium intake, regular aerobic exercise (150 min/week), maintaining a healthy weight, limiting alcohol, and managing stress can lower blood pressure by 5-15 mmHg without medication.

Jump to →

Medication Options

When lifestyle changes aren't enough, medications like ACE inhibitors, ARBs, calcium channel blockers, or diuretics can effectively control blood pressure. Most people need 1-3 medications working together.

Open →

Remote Patient Monitoring

Connected blood pressure cuffs can transmit readings directly to your care team. RPM programs provide ongoing oversight between office visits and can catch dangerous trends before they cause harm.

Jump to →

When to seek help immediately

Any of these with an elevated reading warrants emergency care — call 911 now.

Blood pressure reading of 180/120 mmHg or higher (hypertensive crisis — seek emergency care immediately)

Severe headache with no known cause

Chest pain or difficulty breathing

Vision changes or blurred vision

Difficulty speaking or sudden confusion

Numbness or weakness on one side of the body

Blood in the urine

Nosebleeds that are difficult to stop

Why this is different

Not another symptom checker. A new way to understand and manage your health.

No login needed

No account, no login. Enter your numbers and get a category with next steps right away.

Questions for your doctor

A printable sheet of what to ask at your next visit. General information, not medical advice.

Claude connector

Install the MCP connector in Claude Desktop for persistent, personalized health intelligence.

Find a cardiologist

Search the CMS NPI Registry for cardiologists in your state. Lists who is licensed; does not rate quality.

HSA/FSA, case by case

Some care for a diagnosed condition can qualify as a medical expense under IRS §213(d), case by case.

Your doctor visit companion

Prepare before. Record after. Everything you enter stays on this device.

Want to practice saying it out loud first? Try a scripted practice visit →

What do you want to talk about?

How long have you had elevated readings?

How concerned are you?

5/10

Not veryModeratelyVery concerned

Find a Cardiologist

Real-time search of every cardiologist in the United States. Powered by the CMS NPI Registry.

Install the Claude connector

Add this to your Claude Desktop configuration. It connects Claude to the SolvingHealth MCP server, one server for the whole network, with tools grouped by product rather than by condition.

claude_desktop_config.json

"solvinghealth": {
  "command": "npx",
  "args": ["-y", "mcp-remote",
    "https://solvinghealth-mcp-489007249571.us-central1.run.app/mcp"]
}

Using pre-tax dollars for care

See if your care already qualifiesAssessment

Some care for a diagnosed condition is already a medical expense. We assess whether yours qualifies, document it if it does, and tell you plainly when it doesn't.

Where to go next

Sister sites that cover the next question a blood pressure check usually raises.

High blood pressure often travels with diabetes and kidney disease. A 2026 guideline treats them together: six questions to ask your doctor.

Heart health

Read blood pressure with your other heart numbers. Your week's average can come with you to the Heart Health visit sheet.

In pregnancy or postpartum

Different blood pressure lines apply in pregnancy. Your highest reading can come with you to the Pregnancy Care visit sheet.

For families

Care coordination and a worker-owned care cooperative.

Ready to take the next step?

Start with the reading check or the 7-day log: no login, and your numbers stay on your phone. Your numbers point you to the next concrete step.

Check my reading Make a visit sheet Find a cardiologist

Some blood pressure care for a diagnosed condition can qualify for HSA/FSA, case by case. Check at hsaletter.com

Blood pressure in depth

Evidence-based articles for patients who want to understand more.

When to Worry

Hypertensive crisis: when blood pressure is a true emergency

A blood pressure reading of 180/120 mmHg or higher is a hypertensive crisis. There are two types, distinguished by whether organ damage is occurring.

A hypertensive urgency is a reading of 180/120 without symptoms of acute organ damage. While serious, it does not always require emergency room treatment — your doctor may be able to adjust your medications and see you urgently in clinic. Do not take extra doses of your blood pressure medication on your own without guidance.

A hypertensive emergency is 180/120 accompanied by symptoms suggesting acute organ damage: chest pain (heart attack, aortic dissection), severe headache with vision changes or confusion (hypertensive encephalopathy or stroke), shortness of breath (hypertensive heart failure), or severe back or abdominal pain (aortic dissection). This is a true medical emergency — call 911.

Other warning signs requiring same-day emergency evaluation include: blood pressure above 180/120 in a pregnant woman (possible preeclampsia), sudden onset worst-headache-of-life with high blood pressure (possible subarachnoid hemorrhage), and blood pressure crisis in a person with kidney disease or heart failure.

Do not attempt to lower blood pressure too quickly outside a hospital setting — rapid lowering can cause stroke or cardiac ischemia.

Source: AHA Hypertensive Crisis Scientific Statement 2018; JNC-8; ACC/AHA 2017 Guideline.

Frequently asked questions

Real questions patients ask about blood pressure. General education, not medical advice. When you have read them, check what you know.

This information is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare provider for diagnosis and treatment.

After reading

Check what you know.

The reading check and the home log ask about your numbers. This asks what you know. Eight questions, each keyed to a line on this page; a wrong tap shows the line and where to re-read it. Your answers never leave your phone.

It measures what this page explained, not how your blood pressure is. For that, use the reading check, the home log and your clinician. In an emergency call 911; in crisis call or text 988 first.

1A reading is 180/120 or higher and the person has chest pain or trouble speaking. What does this page say to do?
From this page: a reading of 180/120 or higher with chest pain, shortness of breath, back pain, numbness, weakness, a change in vision or trouble speaking: call 911. Stroke signs (face drooping, arm weakness, speech difficulty): call 911. This comes before anything else. Re-read: Emergency signs first
2A reading is below 90/60 and the person feels dizzy and faint. What does this page say?
From this page: a reading below 90/60 is low. Low readings are often fine, but if you feel dizzy, faint or weak, tell a doctor soon. Call 911 if you pass out or have chest pain. Re-read: Check my reading: a reading below 90/60
3One home reading comes back high. What does this page say a single reading means?
From this page: one reading is not a diagnosis. Log a week of readings to see your real pattern. A log of morning and evening readings over 2 weeks tells your doctor far more than a single office reading. Re-read: The home log: a week of readings
4Under the 2017 AHA/ACC guideline cited on this page, what reading is the threshold for Stage 1 hypertension?
From this page: under the 2017 AHA/ACC guidelines, 130/80 mmHg is the threshold for Stage 1 hypertension (130 to 139 systolic or 80 to 89 diastolic); the previous threshold was 140/90. Elevated is 120 to 129 systolic with a diastolic under 80. Whether to start medication at 130/80 depends on your 10-year cardiovascular risk, not the number alone. Re-read: FAQ: is 130/80 really high blood pressureSource: Whelton, 2017 ACC/AHA hypertension guideline, JACC 2018
5How does this page say a blood pressure should be measured for an accurate number?
From this page: accurate measurement requires sitting quietly for 5 minutes beforehand, back supported, feet flat, arm at heart level, using a validated cuff of the correct size. At least two readings, one minute apart, should be taken and averaged. Re-read: Deep dive: what to expect at a blood pressure appointment
6What does this page call blood pressure that is normal in the office but elevated at home, and why does it matter?
From this page: white coat hypertension (elevated in the office, normal at home) affects 15 to 30% of diagnosed patients and may not require treatment. Masked hypertension (normal in the office, elevated at home) is equally common and more dangerous because it goes undetected. Home monitoring or 24-hour ambulatory monitoring distinguishes them; a home average above 135/85 mmHg is considered hypertensive. Re-read: The hidden drivers: white coat and masked hypertensionSource: Pickering, blood pressure measurement recommendations, Hypertension 2005
7What does this page say 150 minutes a week of moderate aerobic exercise does to systolic blood pressure?
From this page: 150 minutes a week of moderate aerobic exercise (a brisk walk, cycling) lowers systolic pressure by 4 to 9 mmHg; the effect appears within 4 weeks, and resistance training adds another 2 to 4 mmHg. Re-read: Lifestyle changes: aerobic exercise
8In the SPRINT trial cited on this page, what did the lower systolic target do compared with a target below 140 mmHg?
From this page: the SPRINT trial showed a 25% reduction in cardiovascular events and a 27% reduction in all-cause mortality with the lower target. Where it stops: SPRINT's intensive arm aimed below 120 mmHg, in adults 50 and over at raised cardiovascular risk, without diabetes or a prior stroke. Re-read: Deep dive: managing blood pressure for the long termSource: SPRINT Research Group, NEJM 2015

General education, not medical advice

Check the sources linked here, and confirm anything important with your own clinician.

CDC NIH / NHLBI American Heart Association Mayo Clinic

Medical disclaimer: The information on this website is for general educational purposes only and does not constitute medical advice, diagnosis, or treatment. It does not replace a consultation with a qualified healthcare provider. If you are experiencing a medical emergency, call 911 immediately. Always consult your physician before starting, stopping, or changing any treatment.

Same approach, different question. Each one is a real site, not a landing page.

What does your blood pressure reading mean?

Blood pressure check-in

Blood Pressure in 15 seconds

What your numbers mean

What actually moves blood pressure — by how much

DASH diet

Sodium reduction

Aerobic exercise

Weight loss

Alcohol reduction

Potassium increase

Where sodium actually hides

How much does sodium reduction actually move blood pressure?

Your reading on the AHA category map

When blood pressure won't budge: the hidden drivers

Obstructive sleep apnea

NSAIDs and common medications

Primary aldosteronism

Kidney disease

White coat and masked hypertension

Non-adherence to medication

What 7 days of tracking actually tells you

Start your own log

What this pattern shows

Measure it right: the steps and the cuff size

The steps

Which cuff fits your arm

Seven days at home, then what to do with the number

1. Seven days of readings

2. What to do with this number

3. Lying down, then standing

Full blood pressure assessment

What you should know

Understanding Your Numbers

The Silent Threat

Home Monitoring

Lifestyle Changes

Medication Options

Remote Patient Monitoring

When to seek help immediately

Why this is different

No login needed

Questions for your doctor

Claude connector

Find a cardiologist

HSA/FSA, case by case

Your doctor visit companion

Find a Cardiologist

Install the Claude connector

Where to go next

Heart health

In pregnancy or postpartum

For families

Ready to take the next step?

Blood pressure in depth

Hypertensive crisis: when blood pressure is a true emergency

Frequently asked questions

Check what you know.

You knew 0 of 8.

People who came here were often also asking about