What part of the day is blood pressure highest

If you are diagnosed with high blood pressure, talk with your health care team about your blood pressure levels and how these levels affect your treatment plan.

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What are the signs and symptoms of high blood pressure?

High blood pressure usually has no warning signs or symptoms, and many people do not know they have it. Measuring your blood pressure is the only way to know whether you have high blood pressure.

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. High blood pressure can also happen during pregnancy.

You can manage your blood pressure to lower your risk for serious health problems that may affect your heart, brain, kidneys, and eyes.

What problems does high blood pressure cause?

High blood pressure can damage your health in many ways. It can seriously hurt important organs like your heart, brain, kidneys, and eyes.

The good news is that, in most cases, you can manage your blood pressure to lower your risk for serious health problems.

Heart Attack and Heart Disease

High blood pressure can damage your arteries by making them less elastic, which decreases the flow of blood and oxygen to your heart and leads to heart disease. In addition, decreased blood flow to the heart can cause:

Chest pain, also called angina.
Heart attack, which happens when the blood supply to your heart is blocked and heart muscle begins to die without enough oxygen. The longer the blood flow is blocked, the greater the damage to the heart.
Heart failure, a condition that means your heart can’t pump enough blood and oxygen to your other organs.

Stroke and Brain Problems

High blood pressure can cause the arteries that supply blood and oxygen to the brain to burst or be blocked, causing a stroke. Brain cells die during a stroke because they do not get enough oxygen. Stroke can cause serious disabilities in speech, movement, and other basic activities. A stroke can also kill you.

Having high blood pressure, especially in midlife, is linked to having poorer cognitive function and dementia later in life. Learn more about the link between high blood pressure and dementia from the National Institutes of Health’s Mind Your Risks® campaign.

Kidney Disease

Adults with diabetes, high blood pressure, or both have a higher risk of developing chronic kidney disease than those without these conditions.

How do I know if I have high blood pressure?

There’s only one way to know if you have high blood pressure: Have a doctor or other health professional measure it. Measuring your blood pressure is quick and painless.

Talk with your health care team about regularly measuring your blood pressure at home, also called self-measured blood pressure (SMBP) monitoring.

High blood pressure is called the “silent killer” because it usually has no warning signs or symptoms, and many people do not know they have it.

What can I do to prevent or manage high blood pressure?

Many people with high blood pressure can lower their blood pressure into a healthy range or keep their numbers in a healthy range by making lifestyle changes. Talk with your health care team about

Getting at least 150 minutes of physical activity each week (about 30 minutes a day, 5 days a week)
Not smoking
Eating a healthy diet, including limiting sodium (salt) and alcohol
Keeping a healthy weight
Managing stress

Learn more about ways to manage and prevent high blood pressure.

In addition to making positive lifestyle changes, some people with high blood pressure need to take medicine to manage their blood pressure. Learn more about medicines for high blood pressure.

Talk with your health care team right away if you think you have high blood pressure or if you’ve been told you have high blood pressure but do not have it under control.

By taking action to lower your blood pressure, you can help protect yourself against heart disease and stroke, also sometimes called cardiovascular disease (CVD).

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What do your blood pressure numbers mean?

The only way to know if you have high blood pressure (HBP, or hypertension) is to have your blood pressure tested. Understanding your results is key to controlling high blood pressure.

Healthy and unhealthy blood pressure ranges

Learn what’s considered normal, as recommended by the American Heart Association.

Blood Pressure Chart

BLOOD PRESSURE CATEGORY	SYSTOLIC mm Hg (upper number)	and/or	DIASTOLIC mm Hg (lower number)
NORMAL	LESS THAN 120	and	LESS THAN 80
ELEVATED	120 – 129	and	LESS THAN 80
HIGH BLOOD PRESSURE (HYPERTENSION) STAGE 1	130 – 139	or	80 – 89
HIGH BLOOD PRESSURE (HYPERTENSION) STAGE 2	140 OR HIGHER	or	90 OR HIGHER
HYPERTENSIVE CRISIS (consult your doctor immediately)	HIGHER THAN 180	and/or	HIGHER THAN 120

Note: A diagnosis of high blood pressure must be confirmed with a medical professional. A doctor should also evaluate any unusually low blood pressure readings.

Blood pressure categories

The five blood pressure ranges as recognized by the American Heart Association are:

Normal

Blood pressure numbers of less than 120/80 mm Hg are considered within the normal range. If your results fall into this category, stick with heart-healthy habits like following a balanced diet and getting regular exercise.

Elevated

Elevated blood pressure is when readings consistently range from 120-129 systolic and less than 80 mm Hg diastolic. People with elevated blood pressure are likely to develop high blood pressure unless steps are taken to control the condition.

Hypertension Stage 1

Hypertension Stage 1 is when blood pressure consistently ranges from 130-139 systolic or 80-89 mm Hg diastolic. At this stage of high blood pressure, doctors are likely to prescribe lifestyle changes and may consider adding blood pressure medication based on your risk of atherosclerotic cardiovascular disease (ASCVD), such as heart attack or stroke.

Hypertension Stage 2

Hypertension Stage 2 is when blood pressure consistently ranges at 140/90 mm Hg or higher. At this stage of high blood pressure, doctors are likely to prescribe a combination of blood pressure medications and lifestyle changes.

Hypertensive crisis

This stage of high blood pressure requires medical attention. If your blood pressure readings suddenly exceed 180/120 mm Hg, wait five minutes and then test your blood pressure again. If your readings are still unusually high, contact your doctor immediately. You could be experiencing a hypertensive crisis.

If your blood pressure is higher than 180/120 mm Hg and you are experiencing signs of possible organ damage such as chest pain, shortness of breath, back pain, numbness/weakness, change in vision or difficulty speaking, do not wait to see if your pressure comes down on its own. Call 911.

Your blood pressure numbers and what they mean

Your blood pressure is recorded as two numbers:

Systolic blood pressure (the first number) – indicates how much pressure your blood is exerting against your artery walls when the heart beats.
Diastolic blood pressure (the second number) – indicates how much pressure your blood is exerting against your artery walls while the heart is resting between beats.

Which number is more important?

Typically, more attention is given to systolic blood pressure (the first number) as a major risk factor for cardiovascular disease for people over 50. In most people, systolic blood pressure rises steadily with age due to the increasing stiffness of large arteries, long-term buildup of plaque and an increased incidence of cardiac and vascular disease.

However, either an elevated systolic or an elevated diastolic blood pressure reading may be used to make a diagnosis of high blood pressure. According to recent studies, the risk of death from ischemic heart disease and stroke doubles with every 20 mm Hg systolic or 10 mm Hg diastolic increase among people from age 40 to 89.

Why blood pressure is measured in mm Hg

The abbreviation mm Hg means millimeters of mercury. Mercury was used in the first accurate pressure gauges and is still used in medicine today as the standard unit of measurement for pressure.

Taking your pulse versus checking your blood pressure

While both are indications of health, blood pressure and heart rate (pulse) are two separate measurements. Learn more about the difference between blood pressure and heart rate.

Written by American Heart Association editorial staff and reviewed by science and medicine advisers. See our editorial policies and staff.

What time of day should blood pressure be taken?

Take it first in the morning before eating or taking any medications. Take it again in the evening. Each time you measure, take two or three readings to make sure your results are the same. Your health care provider might recommend taking your blood pressure at the same times each day.

What time of day is blood pressure most accurate?

Relax: Measure your blood pressure when you are relaxed, not when you're running late or on the go. Proper timing: Blood pressure is often highest early in the morning – 5 a.m. or 6 a.m. – so choose another time to take it. Be consistent: Take your blood pressure at the same time of day.

How long after waking up should you take your blood pressure?

Your blood pressure should be checked in the morning, about an hour after you wake up, and in the evening, about an hour before you go to sleep, using the same arm each time. Taking 3 consecutive measurements (about 1 minute apart) will provide a more accurate understanding of your "true" blood pressure.

Why is my bp higher in the evening?

Blood pressure naturally drops at night, increases through the day, peaks at midday, and stays high through the afternoon before decreasing in the evening. This is affected by the circadian rhythm among other factors, like exercise, food and drink, and stress. Shift workers might see a reversed pattern.