What it is
High blood pressure (hypertension) is a sustained elevation of systolic blood pressure ≥130 mmHg and/or diastolic ≥80 mmHg.
Research-supported
High Blood Pressure
Persistently elevated blood pressure (≥130/80 mmHg) that places sustained haemodynamic stress on the heart, blood vessels, kidneys, and brain.
CategoryCardiovascular
Reviewed by Ian Henderson · Advisor
26 March 2026
At a glance
High Blood Pressure at a glance
Commonly experienced as
- Most people discover high blood pressure incidentally during routine health checks, often with no prior symptoms. Some report headaches at the back of the head upon waking, nosebleeds, or visual changes in severe cases. Many describe significant lifestyle stress, disrupted sleep, or long periods of chronic overwork preceding diagnosis. The asymptomatic nature often creates dissonance between the reading and how a person feels.
Evidence context
Research-supportedSee the evidence snapshotSafety
See staying safeContext
Patterns of High Blood Pressure
Hypertension is defined as sustained elevation of blood pressure — most guidelines now use ≥130/80 mmHg as the diagnostic threshold (AHA/ACC); NICE and ESC define stage 1 hypertension as ≥140/90 mmHg in clinic. It is classified as primary (essential — 90–95% of cases, multifactorial with genetic and lifestyle determinants) or secondary (5–10% — caused by renal disease, primary aldosteronism, thyroid or adrenal disorders, sleep apnoea, medications). Hypertension is the leading modifiable risk factor for stroke, myocardial infarction, heart failure, chronic kidney disease, and dementia. It is typically asymptomatic until complications develop — 'the silent killer' — making population-level screening critical. Resistant hypertension (uncontrolled on three antihypertensives at maximum doses) requires specialist assessment.
Could this be you
People commonly experience
High Blood Pressure shows up differently for everyone. Browse by how it tends to be felt — these are common experiences, not a checklist or a diagnosis.
In the body1 common experience
- Most people discover high blood pressure incidentally during routine health checks, often with no prior symptoms. Some report headaches at the back of the head upon waking, nosebleeds, or visual changes in severe cases. Many describe significant lifestyle stress, disrupted sleep, or long periods of chronic overwork preceding diagnosis. The asymptomatic nature often creates dissonance between the reading and how a person feels.
Common experiences people describe — not a diagnostic checklist.
The Evidence
Evidence context
What research and clinical guidelines say about high blood pressure — and where lifestyle and complementary approaches fit in.
Overall pictureHigh evidence base
One of the most studied cardiovascular conditions in medicine
Hypertension is extensively researched, with strong international guidelines on screening, lifestyle modification, and pharmacological management. It is typically symptom-free until complications arise, making regular monitoring essential.
When to seek urgent careSome blood pressure situations require immediate medical attention — do not wait.
BP at or above 180/120 mmHg with severe headache, chest pain, or visual disturbance is a hypertensive emergency — call emergency services. New hypertension in pregnancy may indicate pre-eclampsia. Episodes of sweating, palpitations, and headache alongside high BP warrant prompt specialist assessment for rare adrenal causes.
What the evidence showsHypertension research is among the most robust in cardiovascular medicine.
Major guidelines from NICE, ESC, and AHA/ACC consistently support lifestyle change as first-line management for stage 1 hypertension without high cardiovascular risk. Pharmacological options — including ACE inhibitors, ARBs, calcium channel blockers, and thiazide-like diuretics — are well-evidenced. Target BP below 130/80 mmHg is recommended for most adults under 80.
Important safety considerationsCertain medications and substances interact significantly with blood pressure management.
ACE inhibitors and ARBs are contraindicated in pregnancy due to serious fetal risk. NSAIDs can meaningfully raise blood pressure and should be avoided where possible in people with hypertension. Always inform all treating practitioners of every medication and supplement being used, as interactions can affect blood pressure control.
Complementary approaches with evidenceSome lifestyle and complementary strategies have meaningful supporting data.
The DASH diet has robust clinical evidence for reducing blood pressure. Hibiscus tea shows modest reductions in systolic blood pressure in some studies. Slow breathing exercises at around six breaths per minute have demonstrated both acute and sustained effects. Aged garlic extract and hawthorn berry have limited but emerging evidence. These are adjuncts, not substitutes for professional management.
Understanding your care optionsHypertension management typically combines monitoring, lifestyle change, and where needed, medication.
Home blood pressure monitoring is recommended alongside clinic readings for accurate assessment. Lifestyle factors — including sodium reduction, physical activity, alcohol moderation, and weight management — are central to all guideline recommendations. Medication approaches are guided by individual risk profile and comorbidities. Resistant hypertension requires specialist review.
When to involve a qualified practitionerHypertension should always be assessed and monitored by a qualified health professional.
Self-monitoring is valuable but does not replace professional assessment. Secondary causes of hypertension — including kidney disease, hormonal conditions, and sleep apnoea — require investigation. If blood pressure remains uncontrolled despite multiple medications, specialist referral is appropriate. Some supplements, including liquorice root and high-dose caffeine, can directly raise blood pressure and must be disclosed to all practitioners involved in your care.
Safety first
Staying safe
General, informational guidance — not diagnostic. A qualified practitioner can advise on your own situation.
- ACE inhibitors and ARBs are absolutely contraindicated in pregnancy — teratogenic
- NSAIDs significantly worsen blood pressure and should be avoided in hypertensive patients where possible
References
Evidence & Research
Educational sources that inform this overview. Inclusion is for context and does not imply endorsement.
- 2017 ACC/AHA guideline for the prevention, detection, evaluation, and management of high blood pressure in adults
- Recommendations for blood pressure measurement in humans and experimental animals
- Essential hypertension
Full citations are maintained by the Gyfts editorial team and reviewed periodically.
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