High Blood Pressure

What is High Blood Pressure?

High blood pressure, or hypertension, is persistently raised pressure in the arteries. Current US definitions use readings of 130/80 mm Hg or more, and treatment is usually advised once readings stay at 140/90 mm Hg or above.^[1] It is one of the most common chronic conditions and contributes to stroke, heart attack, heart failure and kidney failure.^[1]

Common symptoms

High blood pressure usually causes no symptoms, so many people do not know they have it. Fewer than half of those with hypertension are aware of it.^[2] Headache, dizziness, nosebleeds, chest pain or shortness of breath can occur with very high readings, but they are not reliable signs.

Causes and risk factors

Most hypertension is primary, meaning no single cause is found. It reflects a mix of genetic predisposition and environmental factors that affect several body systems.^[2] Excess weight is the most common driver of primary hypertension.^[3] Other factors include age, a high-salt diet, inactivity, heavy alcohol use, smoking, diabetes, kidney disease and sleep apnea. Some cases are secondary, caused by kidney or hormonal disease or by certain medicines.

How it is diagnosed and treated conventionally

Diagnosis rests on accurate blood pressure measurement on more than one occasion, followed by assessment of cardiovascular risk, signs of organ damage and possible secondary causes.^[2]

Lifestyle changes, including dietary changes and more physical activity, lower blood pressure and help prevent complications.^[2] Medicines are very effective at lowering blood pressure and preventing cardiovascular events. First-line classes include ACE inhibitors, angiotensin receptor blockers, calcium channel blockers and thiazide diuretics.^[2]

Why High Blood Pressure calls for a whole-person approach

Blood pressure is influenced by weight, diet, activity, stress, sleep and kidney and hormone function at once, so no single measure controls it for everyone.^[2] Medicines do the main work, and daily habits support them.

Our role is to support the habits and symptoms around blood pressure, such as stress and sleep, while your physician manages the numbers.

Weight and metabolism

Obesity is the most common cause of primary hypertension, and its effects involve hormone signaling, the renin-angiotensin system, overactivity of the sympathetic nervous system and inflammation.^[3] Weight management is therefore a central part of lifestyle care.

Lifestyle and diet

Dietary changes and increased physical activity are effective in lowering blood pressure.^[2] Your physician or dietitian can advise on salt, potassium and exercise for your situation.

Stress and the nervous system

Overactivity of the sympathetic nervous system is one of the mechanisms linked to raised pressure.^[3] This is one reason relaxation-based practices have been studied for blood pressure.

Sleep

Sleep problems are common in people with hypertension. A meta-analysis of 16 trials with 1,309 patients found acupuncture improved insomnia scores in hypertensive patients, and the authors reported that blood pressure fell as well.^[4]

Acupuncture for High Blood Pressure

What the research shows

Acupuncture has not been shown to lower blood pressure in a lasting way. Study quality is low, and results differ depending on the comparison used.

A Cochrane review of 22 trials with 1,744 people found no evidence of a sustained blood pressure-lowering effect. Four sham-controlled trials gave very low-quality evidence of a small short-term drop (about 3 mm Hg systolic) within 24 hours. Larger effects seen against drugs most likely reflected bias, since patients and practitioners knew who got what.^[5]

A meta-analysis of 30 trials with 2,107 patients found acupuncture added to blood pressure drugs lowered readings more than drugs alone, but acupuncture alone did not differ from drugs or from sham. The authors called the evidence inadequate and the quality low.^[6] A review of 23 trials reached a similar conclusion: adjunctive use looked promising, evidence for acupuncture alone was insufficient, and safety reporting was poor.^[7]

For moxibustion, a review of 5 low-quality trials found no clear benefit against drugs and a possible benefit as an add-on, with no firm conclusion possible.^[8]

How acupuncture may work

We did not find a mechanism study for blood pressure that we could cite. Researchers often propose effects on the autonomic nervous system, but for hypertension this remains a hypothesis, not an established explanation.

What treatment involves

Treatment uses fine, sterile, single-use needles placed at selected points, usually left in place for about 20 to 40 minutes, as a course of several visits with reassessment. In prospective studies, about 9 in 100 patients had a minor reaction such as soreness, bleeding or bruising at a needle site, and serious events occurred in about 1 in 10,000 patients.^[9] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker, which matters for electroacupuncture. Keep checking your blood pressure at home or with your physician as advised.

Ayurvedic medicine for High Blood Pressure

The Ayurvedic view

Ayurveda does not have a single equivalent of hypertension. Raised pressure is traditionally linked to imbalances of the doshas, particularly Pitta and Vata, with stress and diet seen as aggravating factors, and the condition is described under disorders of the blood channels. These are traditional categories, not biomedical diagnoses.

Therapies that may be used

Care is individualized and traditionally includes:

• Diet and daily routine, such as regular meals, less salty and fried food, and regular sleep hours
• Stress-calming practices such as breathing exercises, meditation and gentle yoga
• Herbs prescribed individually by a qualified practitioner
• Warm oil massage for relaxation

Panchakarma is not appropriate during pregnancy, acute illness or frailty, and strong cleansing procedures are generally not suitable for people with unstable or poorly controlled blood pressure.

What the research shows

We found no clinical trials of Ayurvedic medicine as a whole system for hypertension. Evidence exists for yoga, which belongs to the same tradition, and it is very limited. A meta-analysis of 7 trials with 452 people found very low-quality evidence that yoga lowered blood pressure compared with usual care, with high heterogeneity and more adverse events during yoga. The authors concluded larger studies are needed.^[10]

A meta-analysis of 12 trials with 996 participants found transcendental meditation lowered blood pressure by about 4 mm Hg systolic and 2 mm Hg diastolic against controls, although biases may have influenced the results.^[11] Meditation is a modern technique rather than a classical Ayurvedic therapy.

Herbal medicine for High Blood Pressure

Herbs and formulas that have been studied

Herbs studied for blood pressure include garlic, hibiscus (roselle), ginkgo and, in Chinese medicine, the formula Tianma Gouteng Yin.^{[12, 13, 14, 15]}

What the research shows

The evidence is limited, and mostly small trials. A meta-analysis of 9 double-blind trials with 482 hypertensive people found garlic preparations lowered blood pressure more than placebo, but the trials were small and heterogeneous, and the effect on systolic pressure was smaller in higher-quality trials.^[12] A meta-analysis of 13 trials with 1,205 people found hibiscus lowered pressure versus placebo in mild-to-moderate hypertension, with no advantage over antihypertensive drugs.^[13]

Not all reviews are positive. A Cochrane review found only one small trial of roselle, in people with type 2 diabetes, and judged the evidence insufficient.^[16] A review of ginkgo extract found high risk of bias and no firm conclusions.^[14] A Cochrane review of Tianma Gouteng Yin found no eligible trials.^[15]

Safety and herb-drug interactions

Herbs can interact with blood pressure medicines. A review of herb-drug interactions reported that ginkgo raised blood pressure when combined with a thiazide diuretic, and that garlic and dan shen increased bleeding or clotting time with warfarin.^[17] Case reports describe bleeding when warfarin was combined with herbs including dang gui, ginseng and ginkgo.^[18] Tell us about all antihypertensives, diuretics and blood thinners before any herb is considered.

In one study, about one fifth of Ayurvedic products bought online contained detectable lead, mercury or arsenic.^[19] Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding, or have liver or kidney disease.

Translating traditional medicine into modern biological language

This is interpretation, not equivalence. Chinese medicine often describes high blood pressure as liver yang rising or phlegm-dampness, and Ayurveda as aggravated Pitta or Vata under stress. Researchers studying related ideas look at sympathetic nervous system activity, stress physiology, body weight and vascular function.^[3]

No study has shown that these traditional patterns correspond to specific biological processes.

How this care fits with your medical care

Complementary care for high blood pressure supports, and never replaces, your physician's plan. Do not stop or change prescribed blood pressure medicines, or skip monitoring, because of acupuncture, herbs or any other therapy. Stopping medicines can raise your pressure and your risk of stroke or heart attack.

We do not diagnose or treat hypertension. Please bring your diagnosis, recent blood pressure readings, a full list of medicines and supplements, and any kidney or heart test results.

When to seek urgent medical care

Very high blood pressure can cause organ damage and needs urgent assessment.

• A reading well above your usual range, such as 180/120 mm Hg or higher, especially with symptoms
• Severe headache with confusion, vision changes or vomiting
• Chest pain, pressure or severe shortness of breath
• Sudden weakness or numbness on one side, facial drooping or trouble speaking
• Fainting or a seizure
• Blood pressure above 140/90 mm Hg during pregnancy with headache or vision changes

If any of these occur, call 911 or go to the nearest emergency department.