What is hypertension? A Mayo Clinic expert explains.
Learn more about hypertension from nephrologist Leslie Thomas, M.D.
Hi. I'm Dr. Leslie Thomas, a nephrologist at Mayo Clinic. In this video, we'll cover the basics of hypertension. What is it? Who gets it? The symptoms, diagnosis, and treatment. Whether you're looking for answers for yourself or someone you love, we're here to give you the best information available. Hypertension means high blood pressure. A blood pressure measurement includes two numbers. Those numbers are the systolic blood pressure and the diastolic blood pressure. Because of the pumping action of the heart, the pressure within the arteries cycles between a higher pressure and a lower pressure. The higher pressure occurs during the contraction of the heart's left ventricle. The higher pressure is known as the systolic blood pressure. The lower pressure occurs during the relaxation of the heart's left ventricle. This lower pressure is referred to as the diastolic blood pressure.
Who gets it?
Hypertension is a very common condition affecting up to 40% of adults. It is one of the most common conditions for which medications are prescribed. Most people with hypertension have primary hypertension. How primary hypertension develops is not entirely understood. However, it has felt to result from many inherited and environmental factors that interact in complex ways within the body. Risks for the development of primary hypertension include family history, advancing age, obesity, high sodium diet, alcohol consumption and physical inactivity. In cases of hypertension in which a specific cause is identified, the term secondary hypertension is used. Many potential causes of secondary hypertension exist. These causes include certain prescription or over-the-counter medications, kidney disease, certain endocrine disorders, or a significant narrowing of the aorta or a kidney artery.
What are the symptoms?
Rarely, an individual with very high blood pressure may have symptoms. These symptoms might include shortness of breath, blurry vision or headache.
How is it diagnosed?
Hypertension can be diagnosed by performing careful and repeated measures of the blood pressure. Blood pressure categories include normal blood pressure, defined as a systolic pressure less than 120, and a diastolic pressure less than 80. Elevated blood pressure is defined as a systolic pressure 120 to 129, and a diastolic pressure less than 80. Hypertension is defined as systolic pressure greater than or equal to 130, or a diastolic pressure greater than or equal to 80.
How is it treated?
Treatment of hypertension involves lifestyle modification alone or in combination with antihypertensive medication therapy. For individuals with certain common conditions, including cardiovascular disease, chronic kidney disease, and diabetes mellitus. Certain medications may be more advantageous to use compared to other medications. Deciding upon the best blood pressure to target, when to start antihypertensive medication therapy, and which specific medication or a combination of medications to utilize is highly individualized and informed by many factors.
You and your care team can work together to create the best treatment plan for you. No matter what methods you decide on. There are plenty of reasons to be optimistic about managing your hypertension. If you'd like to learn even more about hypertension, watch our other related videos or visit mayoclinic.org. We wish you well.
High blood pressure is a common condition that affects the body's arteries. It's also called hypertension. If you have high blood pressure, the force of the blood pushing against the artery walls is consistently too high. The heart has to work harder to pump blood.
Blood pressure is measured in millimeters of mercury (mm Hg). In general, hypertension is a blood pressure reading of 130/80 mm Hg or higher.
The American College of Cardiology and the American Heart Association divide blood pressure into four general categories. Ideal blood pressure is categorized as normal.)
- Normal blood pressure. Blood pressure is 120/80 mm Hg or lower.
- Elevated blood pressure. The top number ranges from 120 to 129 mm Hg and the bottom number is below, not above, 80 mm Hg.
- Stage 1 hypertension. The top number ranges from 130 to 139 mm Hg or the bottom number is between 80 and 89 mm Hg.
- Stage 2 hypertension. The top number is 140 mm Hg or higher or the bottom number is 90 mm Hg or higher.
Blood pressure higher than 180/120 mm Hg is considered a hypertensive emergency or crisis. Seek emergency medical help for anyone with these blood pressure numbers.
Untreated, high blood pressure increases the risk of heart attack, stroke and other serious health problems. It's important to have your blood pressure checked at least every two years starting at age 18. Some people need more-frequent checks.
Healthy lifestyle habits —such as not smoking, exercising and eating well — can help prevent and treat high blood pressure. Some people need medicine to treat high blood pressure.
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Most people with high blood pressure have no symptoms, even if blood pressure readings reach dangerously high levels. You can have high blood pressure for years without any symptoms.
A few people with high blood pressure may have:
- Shortness of breath
However, these symptoms aren't specific. They usually don't occur until high blood pressure has reached a severe or life-threatening stage.
When to see a doctor
Blood pressure screening is an important part of general health care. How often you should get your blood pressure checked depends on your age and overall health.
Ask your provider for a blood pressure reading at least every two years starting at age 18. If you're age 40 or older, or you're 18 to 39 with a high risk of high blood pressure, ask for a blood pressure check every year.
Your care provider will likely recommend more-frequent readings if have high blood pressure or other risk factors for heart disease.
Children age 3 and older may have blood pressure measured as a part of their yearly checkups.
If you don't regularly see a care provider, you may be able to get a free blood pressure screening at a health resource fair or other locations in your community. Free blood pressure machines are also available in some stores and pharmacies. The accuracy of these machines depends on several things, such as a correct cuff size and proper use of the machines. Ask your health care provider for advice on using public blood pressure machines.
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Blood pressure is determined by two things: the amount of blood the heart pumps and how hard it is for the blood to move through the arteries. The more blood the heart pumps and the narrower the arteries, the higher the blood pressure.
There are two main types of high blood pressure.
Primary hypertension, also called essential hypertension
For most adults, there's no identifiable cause of high blood pressure. This type of high blood pressure is called primary hypertension or essential hypertension. It tends to develop gradually over many years. Plaque buildup in the arteries, called atherosclerosis, increases the risk of high blood pressure.
This type of high blood pressure is caused by an underlying condition. It tends to appear suddenly and cause higher blood pressure than does primary hypertension. Conditions and medicines that can lead to secondary hypertension include:
- Adrenal gland tumors
- Blood vessel problems present at birth, also called congenital heart defects
- Cough and cold medicines, some pain relievers, birth control pills, and other prescription drugs
- Illegal drugs, such as cocaine and amphetamines
- Kidney disease
- Obstructive sleep apnea
- Thyroid problems
Sometimes just getting a health checkup causes blood pressure to increase. This is called white coat hypertension.
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High blood pressure has many risk factors, including:
- Age. The risk of high blood pressure increases with age. Until about age 64, high blood pressure is more common in men. Women are more likely to develop high blood pressure after age 65.
- Race. High blood pressure is particularly common among Black people. It develops at an earlier age in Black people than it does in white people.
- Family history. You're more likely to develop high blood pressure if you have a parent or sibling with the condition.
- Obesity or being overweight. Excess weight causes changes in the blood vessels, the kidneys and other parts of the body. These changes often increase blood pressure. Being overweight or having obesity also raises the risk of heart disease and its risk factors, such as high cholesterol.
- Lack of exercise. Not exercising can cause weight gain. Increased weight raises the risk of high blood pressure. People who are inactive also tend to have higher heart rates.
- Tobacco use or vaping. Smoking, chewing tobacco or vaping immediately raises blood pressure for a short while. Tobacco smoking injures blood vessel walls and speeds up the process of hardening of the arteries. If you smoke, ask your care provider for strategies to help you quit.
- Too much salt. A lot of salt — also called sodium — in the body can cause the body to retain fluid. This increases blood pressure.
- Low potassium levels. Potassium helps balance the amount of salt in the body's cells. A proper balance of potassium is important for good heart health. Low potassium levels may be due to a lack of potassium in the diet or certain health conditions, including dehydration.
- Drinking too much alcohol. Alcohol use has been linked with increased blood pressure, particularly in men.
- Stress. High levels of stress can lead to a temporary increase in blood pressure. Stress-related habits such as eating more, using tobacco or drinking alcohol can lead to further increases in blood pressure.
- Certain chronic conditions. Kidney disease, diabetes and sleep apnea are some of the conditions that can lead to high blood pressure.
- Pregnancy. Sometimes pregnancy causes high blood pressure.
High blood pressure is most common in adults. But kids can have high blood pressure too. High blood pressure in children may be caused by problems with the kidneys or heart. But for a growing number of kids, high blood pressure is due to lifestyle habits such as an unhealthy diet and lack of exercise.
The excessive pressure on the artery walls caused by high blood pressure can damage blood vessels and body organs. The higher the blood pressure and the longer it goes uncontrolled, the greater the damage.
Uncontrolled high blood pressure can lead to complications including:
- Heart attack or stroke. Hardening and thickening of the arteries due to high blood pressure or other factors can lead to a heart attack, stroke or other complications.
- Aneurysm. Increased blood pressure can cause a blood vessel to weaken and bulge, forming an aneurysm. If an aneurysm ruptures, it can be life-threatening.
- Heart failure. When you have high blood pressure, the heart has to work harder to pump blood. The strain causes the walls of the heart's pumping chamber to thicken. This condition is called left ventricular hypertrophy. Eventually, the heart can't pump enough blood to meet the body's needs, causing heart failure.
- Kidney problems. High blood pressure can cause the blood vessels in the kidneys to become narrow or weak. This can lead to kidney damage.
- Eye problems. Increased blood pressure can cause thickened, narrowed or torn blood vessels in the eyes. This can result in vision loss.
- Metabolic syndrome. This syndrome is a group of disorders of the body's metabolism. It involves the irregular breakdown of sugar, also called glucose. The syndrome includes increased waist size, high triglycerides, decreased high-density lipoprotein (HDL or "good") cholesterol, high blood pressure and high blood sugar levels. These conditions make you more likely to develop diabetes, heart disease and stroke.
- Changes with memory or understanding. Uncontrolled high blood pressure may affect the ability to think, remember and learn.
- Dementia. Narrowed or blocked arteries can limit blood flow to the brain. This can cause a certain type of dementia called vascular dementia. A stroke that interrupts blood flow to the brain also can cause vascular dementia.
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By Mayo Clinic Staff
Sept. 15, 2022
What causes high blood pressure? High blood pressure usually develops over time. It can happen because of unhealthy lifestyle choices, such as not getting enough regular physical activity. Certain health conditions, such as diabetes and having obesity, can also increase the risk for developing high blood pressure.What is hypertension explain the causes and symptoms of hypertension? ›
High blood pressure is a common condition that affects the body's arteries. It's also called hypertension. If you have high blood pressure, the force of the blood pushing against the artery walls is consistently too high. The heart has to work harder to pump blood.What are 10 causes of hypertension? ›
- are overweight.
- eat too much salt and do not eat enough fruit and vegetables.
- do not do enough exercise.
- drink too much alcohol or coffee (or other caffeine-based drinks)
- do not get much sleep or have disturbed sleep.
- are over 65.
- have a relative with high blood pressure.
Symptoms of High Blood Pressure
Lightheadedness/Fainting. Fatigue. Headache. Heart palpitations.
Insomnia is linked to high blood pressure and heart disease. Over time, poor sleep can also lead to unhealthy habits that can hurt your heart, including higher stress levels, less motivation to be physically active, and unhealthy food choices.How to bring blood pressure down? ›
- Lose extra pounds and watch your waistline. Blood pressure often increases as weight increases. ...
- Exercise regularly. ...
- Eat a healthy diet. ...
- Reduce salt (sodium) in your diet. ...
- Limit alcohol. ...
- Quit smoking. ...
- Get a good night's sleep. ...
- Reduce stress.
Hypertension, also known as high or raised blood pressure, is a condition in which the blood vessels have persistently raised pressure. Blood is carried from the heart to all parts of the body in the vessels. Each time the heart beats, it pumps blood into the vessels.Can hypertension be cured? ›
While there is no cure for high blood pressure, it is important for patients to take steps that matter, such as making effective lifestyle changes and taking BP-lowering medications as prescribed by their physicians.What are the types and causes of hypertension? ›
- Primary: High blood pressure that is not related to another medical condition.
- Secondary: Another medical condition that causes high blood pressure, usually occurring in the kidneys, arteries, heart, or endocrine system. Examples include: Sleep problems like sleep apnea.
Foods high in salt, sugar, and saturated or trans fats can increase blood pressure and damage your heart health. By limiting these foods and replacing them with healthy options, you can keep your blood pressure at a healthy level.
Anxiety doesn't cause long-term high blood pressure (hypertension). But episodes of anxiety can cause dramatic, temporary spikes in blood pressure.Can stress cause high blood pressure? ›
Reactions to stress can affect blood pressure
The body releases a surge of hormones when under stress. These hormones cause the heart to beat faster and the blood vessels to narrow. These actions increase blood pressure for a time. There's no proof that stress by itself causes long-term high blood pressure.
Blood pressure has a daily pattern. Usually, blood pressure starts to rise a few hours before a person wakes up. It continues to rise during the day, peaking in midday. Blood pressure typically drops in the late afternoon and evening.What is the best position to sleep in with high blood pressure? ›
Sleeping on the left side is the best sleeping position for hypertension because it relieves blood pressure on blood vessels that return blood to the heart.What causes blood pressure to not go down? ›
Possible causes of resistant hypertension
The accumulation of artery-clogging plaque in blood vessels that nourish the kidneys, a condition called renal artery stenosis. Sleep problems, such as the breath-holding type of snoring known as obstructive sleep apnea.
Something as simple as keeping yourself hydrated by drinking six to eight glasses of water every day improves blood pressure. Water makes up 73% of the human heart,¹ so no other liquid is better at controlling blood pressure.Does lemon water bring your blood pressure down? ›
Citrus, such as lemon and limes, has been shown to reduce blood pressure and has the added benefit of adding a little flavor to a boring glass of water.Does cinnamon lower blood pressure? ›
A review of 9 studies including 641 participants showed that taking cinnamon reduced systolic and diastolic blood pressure by an average of 6.2 mm Hg and 3.9 mm Hg, respectively.
Essential (primary) hypertension occurs when you have abnormally high blood pressure that's not the result of a medical condition. This form of high blood pressure is often due to obesity, family history and an unhealthy diet. The condition is reversible with medications and lifestyle changes.What organ regulates blood pressure? ›
The kidney is the main organ involved in controlling blood pressure. Blood pressure can be described as the resistance of the blood vessels acting against the blood flow generated by a heartbeat. The kidneys are able to regulate blood pressure through two main actions.
Normal blood pressure is when your blood pressure is lower than 120/80 mm Hg most of the time. High blood pressure (hypertension) is when one or both of your blood pressure readings are higher than 130/80 mm Hg most of the time.How long will I live with hypertension? ›
With that being said, research³ does show that although you can live a long life, it may be five to seven years shorter than those without high blood pressure. Some potential causes⁴ of this shorter life expectancy include smoking and obesity.How long does it take for hypertension to go away? ›
“It may take a month to six weeks to bring your blood pressure down by slowly raising your medication doses,” Durso notes. “Lowering blood pressure too quickly can cause dizziness and increase the risk for falls.” Report side effects. “Don't stop medications on your own,” warns Durso.What is the first drug of choice for hypertension? ›
Choice of initial therapy in most patients — The three primary options for antihypertensive drug therapy in most patients include an ACE inhibitor (or ARB), a calcium channel blocker, or a thiazide diuretic (preferably a thiazide-like diuretic) .Which disease is caused by hypertension? ›
Hypertension can also burst or block arteries that supply blood and oxygen to the brain, causing a stroke. In addition, hypertension can cause kidney damage, leading to kidney failure.Which type of hypertension is life threatening? ›
Malignant hypertension is extremely high blood pressure that develops rapidly and causes some type of organ damage. Normal blood pressure is below 120/80. A person with malignant hypertension has a blood pressure that's typically above 180/120. Malignant hypertension should be treated as a medical emergency.What causes hypertension with age? ›
High blood pressure, or hypertension, is a major health problem that is common in older adults. Your body's network of blood vessels, known as the vascular system, changes with age. Arteries get stiffer, causing blood pressure to go up. This can be true even for people who have heart-healthy habits and feel just fine.What are 5 risk factors for hypertension? ›
What are the risk factors for hypertension? Modifiable risk factors include unhealthy diets (excessive salt consumption, a diet high in saturated fat and trans fats, low intake of fruits and vegetables), physical inactivity, consumption of tobacco and alcohol, and being overweight or obese.What are the 5 factors that affect blood pressure? ›
Blood pressure increases with increased cardiac output, peripheral vascular resistance, volume of blood, viscosity of blood and rigidity of vessel walls.What are the 5 stages of hypertension? ›
There are four stages: normal, elevated (not officially considered hypertension), stage I hypertension, and stage II hypertension.
- Elevated Blood Pressure. ...
- Diabetes. ...
- Unhealthy Diet. ...
- Physical Inactivity. ...
- Obesity. ...
- Too Much Alcohol. ...
- Tobacco Use. ...
- Genetics and Family History.