Blood pressure screening

Overview

Blood pressure screening is a simple test that measures the force of blood against the walls of your arteries. It helps find out if your blood pressure is too high (hypertension) or too low (hypotension). High blood pressure often has no symptoms but can damage your heart, brain, and kidneys if left untreated. Screening can catch it early so you can manage it.

Yes, high blood pressure is very common. About 1 in 3 adults worldwide have it, and many don’t know it. That’s why regular screening is so important.

Blood pressure screening is recommended for all adults starting at age 18. It is especially important for people with a family history of high blood pressure, those who are overweight, smokers, and people with diabetes or kidney disease.

Symptoms

Common symptoms

• Most people with high blood pressure have no symptoms at all.
• Some people may experience headaches, shortness of breath, or nosebleeds, but these are not specific and usually only happen when blood pressure is very high.

Symptoms in children

• Children with high blood pressure often have no symptoms. Occasionally, they may have headaches, blurred vision, or trouble sleeping.

Symptoms in older adults

• Older adults may have isolated systolic hypertension – high top number but normal bottom number. Often no symptoms, but they may feel dizzy or tired.

Causes

Main causes

• Primary hypertension – the most common type, with no single cause. It develops gradually over years due to genetics, lifestyle, and aging.
• Secondary hypertension – caused by an underlying condition, such as kidney disease, adrenal gland tumors, or certain medications (like birth control pills or decongestants).

Risk factors

• Being older (over 65)
• Being overweight or obese
• Not being physically active
• Eating too much salt (sodium)
• Drinking too much alcohol
• Smoking or using tobacco
• Family history of high blood pressure
• Having diabetes or high cholesterol

When to see a doctor

See a doctor urgently if:

• If you have a blood pressure reading of 180/120 mm Hg or higher, even if you feel fine – get medical attention the same day.
• If you have symptoms of a hypertensive crisis (see emergency section).

Book a routine appointment if:

• All adults should have their blood pressure checked at least once every two years if it’s normal. More often if it’s borderline or if you have risk factors.
• If you are diagnosed with high blood pressure, you will need regular check-ups to monitor and adjust treatment.

Diagnosis

Your doctor or nurse will use a blood pressure monitor (a cuff around your arm). They will take two or more readings at separate visits to confirm a diagnosis. You may also be asked to monitor your blood pressure at home with a home monitor.

Tests that may be done

• Blood pressure measurement using a sphygmomanometer (the arm cuff device)
• Urine test to check for kidney problems
• Blood test to check kidney function, blood sugar, and cholesterol
• Electrocardiogram (ECG) to check your heart’s health

What to expect at your appointment

Screening is quick and painless. You sit quietly with your arm supported at heart level. The cuff inflates and then deflates slowly. The whole thing takes just a minute or two. If your reading is high, the doctor may ask you to come back for another check, or they may recommend 24-hour ambulatory monitoring (a device you wear for a day) to get a more accurate picture.

Treatment

Treatment for high blood pressure usually starts with lifestyle changes. If those are not enough, your doctor may prescribe medication. The goal is to lower your blood pressure to a safe level and reduce your risk of heart disease, stroke, and kidney damage.

Self-care at home

• Eat a healthy diet low in salt, rich in fruits, vegetables, and whole grains (like the DASH diet).
• Be physically active – aim for at least 150 minutes of moderate activity per week (e.g., brisk walking).
• Maintain a healthy weight – losing even a little weight can help lower blood pressure.
• Limit alcohol – no more than one drink a day for women, two for men.
• Quit smoking – smoking damages blood vessels and raises blood pressure.
• Manage stress – try relaxation techniques like deep breathing or meditation.

Medical treatments

If lifestyle changes aren’t enough, your doctor may prescribe blood pressure-lowering medication. Several types are available, and they work in different ways – for example, by relaxing blood vessels or reducing fluid in the body. Most people need more than one medication. Your doctor will find the right combination for you. Never stop or change medication without talking to your doctor.

When is surgery considered?

Surgery is rarely needed for high blood pressure itself. It may be used if high blood pressure is caused by a specific problem, such as a narrowed artery to the kidney (renal artery stenosis) or a tumor on the adrenal gland (pheochromocytoma). In those cases, treating the underlying condition can correct the blood pressure.

Living with this condition

Living with high blood pressure means making healthy choices every day. You will need to check your blood pressure regularly – either at home or at the doctor's office. Stick with your treatment plan, and keep all follow-up appointments. Many people with high blood pressure live long, healthy lives with good management.

Lifestyle tips

• Take your medications exactly as prescribed.
• Monitor your blood pressure at home if advised – keep a log to share with your doctor.
• Reduce salt – avoid processed foods and use herbs and spices instead of salt.
• Stay active – find activities you enjoy, like walking, swimming, or cycling.
• Limit alcohol and avoid tobacco.

Diet and exercise

A heart-healthy diet (like the DASH diet) is rich in fruits, vegetables, whole grains, and low-fat dairy. It is low in saturated fat, cholesterol, and salt. Regular exercise – even 30 minutes most days – can lower your blood pressure by 5–10 mm Hg. Always check with your doctor before starting a new exercise program.

Mental health and emotional wellbeing

Being diagnosed with a chronic condition can cause stress, anxiety, or worry. Some people feel frustrated with having to take daily medication. It’s normal to have these feelings. Talk to your doctor or a counselor if you feel overwhelmed. Managing your mental health is part of managing your overall health.

Prevention

You can lower your risk of developing high blood pressure by maintaining a healthy weight, eating a balanced diet low in salt, staying active, limiting alcohol, not smoking, and managing stress. Even if you have a family history, a healthy lifestyle can make a big difference.

Screening programmes

Regular blood pressure screening is the best way to catch high blood pressure early. Adults should be screened at least every two years, or more often if you have risk factors. Home monitoring can also help track your numbers between doctor visits.

Complications

If left untreated

• Heart attack or heart failure
• Stroke
• Kidney damage or kidney failure
• Vision loss (damage to the retina)
• Peripheral artery disease (narrowed blood vessels in the legs)
• Aneurysm (a bulge in a blood vessel that can burst)

Long-term outlook

The outlook for high blood pressure is very good if it is detected and treated early. With lifestyle changes and medication, most people can keep their blood pressure under control and live a full, active life. Regular monitoring and following your doctor’s advice are key. Untreated high blood pressure can lead to serious problems, but with proper care, you can greatly reduce those risks.

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