Blood pressure is one of the few health numbers that can quietly climb for years without causing a single symptom. That is why high blood pressure, or hypertension, is often called a “silent” condition. The good news is that it is easy to measure, and small, steady changes can bring it down. This guide explains what your reading means, what pushes it up, and the practical steps that help.
What the two numbers mean
A blood pressure reading has two numbers, written like 118/76 mm Hg.
- Systolic (top number): the pressure in your arteries when your heart beats.
- Diastolic (bottom number): the pressure in your arteries between beats, when the heart rests.
Both numbers matter. In adults, a high systolic number is the more common problem, especially after age 50, as arteries become stiffer.
Blood pressure categories for adults
The American Heart Association and the American College of Cardiology use these categories for adults:
| Category | Systolic (top) | Diastolic (bottom) | |
|---|---|---|---|
| Normal | Less than 120 | and | Less than 80 |
| Elevated | 120–129 | and | Less than 80 |
| Stage 1 hypertension | 130–139 | or | 80–89 |
| Stage 2 hypertension | 140 or higher | or | 90 or higher |
| Severe (crisis) range | Higher than 180 | and/or | Higher than 120 |
One high reading does not mean you have hypertension. A diagnosis is usually based on the average of several readings taken on different occasions. Readings taken at home or with a 24-hour monitor help rule out “white coat” hypertension, where pressure rises only in the clinic. You can read more on the American Heart Association’s guide to blood pressure readings.
When to act fast: a reading above 180/120 with chest pain, shortness of breath, back pain, numbness or weakness, vision changes or difficulty speaking needs emergency care. Call 911 or your local emergency number.
Why high blood pressure matters
High pressure strains the walls of your arteries over time. That strain raises the risk of:
- Heart attack and heart failure
- Stroke
- Chronic kidney disease
- Vision loss
- Memory problems and vascular dementia
Because damage builds up slowly, treating high blood pressure early is one of the most effective ways to protect long-term heart and brain health.
Common causes and risk factors
Most adults have primary hypertension, which develops gradually without one single cause. Factors that raise the risk include:
- Age and family history
- Excess body weight
- High salt (sodium) intake and low potassium intake
- Physical inactivity
- Regular heavy alcohol use
- Smoking
- Long-term stress and poor sleep, including untreated sleep apnea
Secondary hypertension is caused by another condition or medicine. Examples include kidney disease, thyroid problems, adrenal gland disorders, obstructive sleep apnea, and some medicines such as decongestants and certain pain relievers. Secondary causes are more likely when blood pressure rises suddenly, starts at a young age, or stays high despite treatment.
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Symptoms: usually none
Most people with high blood pressure feel completely well. Headaches, nosebleeds or dizziness are not reliable warning signs. The only way to know your numbers is to measure them.
How to measure blood pressure correctly at home
Home monitoring gives your doctor a clearer picture. For an accurate reading:
- Use a validated upper-arm cuff in the right size for your arm.
- Avoid caffeine, exercise and smoking for 30 minutes before measuring.
- Sit quietly for 5 minutes with your back supported and feet flat on the floor.
- Rest your arm on a table so the cuff is at heart level.
- Do not talk during the reading.
- Take two readings one minute apart, morning and evening, and record them.
Bring your log and your monitor to appointments so your clinician can check it against their equipment.
Lifestyle changes that lower blood pressure
Lifestyle steps help everyone with raised blood pressure, and for some people they are enough on their own.
Cut back on sodium
Most sodium comes from packaged, restaurant and processed foods rather than the salt shaker. Reading labels and cooking more meals at home can make a meaningful difference. Many adults benefit from aiming for less than 1,500 mg a day, and even a reduction of 1,000 mg a day can help.
Follow a DASH-style eating pattern
The DASH diet (Dietary Approaches to Stop Hypertension) focuses on vegetables, fruit, whole grains, beans, nuts, low-fat dairy, fish and poultry, with less red meat, sugar and saturated fat. It is rich in potassium, magnesium and fiber, which support healthy blood pressure.
Move more
Aim for at least 150 minutes a week of moderate activity, such as brisk walking or cycling. Regular exercise strengthens the heart and helps arteries stay flexible.
Manage weight
For people who are overweight, losing even a modest amount of weight can lower blood pressure.
Limit alcohol and stop smoking
Keeping alcohol low and quitting smoking protect your arteries and lower overall cardiovascular risk.
Sleep and stress
Aim for 7 or more hours of sleep. If you snore loudly or feel exhausted during the day, ask about sleep apnea, which is a common and treatable cause of high blood pressure.
Medicines for high blood pressure
If lifestyle changes are not enough, or your risk of heart disease is higher, your doctor may recommend medicine. Common types include:
- Thiazide-type diuretics, which help the kidneys remove extra sodium and water
- ACE inhibitors and ARBs, which relax blood vessels
- Calcium channel blockers, which relax the muscles in artery walls
Many people need two medicines to reach their goal, sometimes combined in a single pill. Take medicine every day as prescribed, even when you feel fine, and do not stop without talking to your clinician. Report side effects such as dizziness, swelling or a dry cough, because there is usually an alternative.
Your blood pressure goal
For most adults being treated for hypertension, the target is below 130/80 mm Hg. Your clinician may set a different goal based on your age, other conditions and how well you tolerate treatment.
Frequently asked questions
Can high blood pressure be cured?
Primary hypertension is usually a long-term condition that can be controlled rather than cured. Some people are able to reduce or stop medicine after significant lifestyle changes, but only under medical supervision.
Is 130/85 high?
Yes. A top number of 130–139 or a bottom number of 80–89 falls into stage 1 hypertension if it is confirmed over several readings.
How often should I check my blood pressure?
Adults with normal readings should have it checked at least once a year or as advised. People with elevated readings or hypertension usually monitor at home more often.
The bottom line
High blood pressure is common, usually silent, and very treatable. Know your numbers, measure correctly at home, and build habits that lower sodium and raise activity. If your readings stay at 130/80 or above, talk with a healthcare professional about a plan that fits you.
This article is for general information and is not a substitute for advice from a qualified healthcare professional.