Understanding Blood Pressure: Why Regular Monitoring Could Save Your Life

Blood pressure is the force your blood exerts against the walls of your arteries as your heart pumps it around your body. It is measured in millimetres of mercury (mmHg) and recorded as two numbers.

The top number (systolic) is the pressure when your heart beats and pushes blood out. The bottom number (diastolic) is the pressure when your heart rests between beats.

A reading of 120/80 mmHg, for example, means a systolic pressure of 120 and a diastolic pressure of 80.

Your blood pressure naturally rises and falls throughout the day. It tends to be lower when you are relaxed and higher when you are active or stressed. This is why a single reading only tells part of the story.

Below 120/80 mmHg is considered optimal. Your cardiovascular system is working well.

Between 120/80 and 139/89 mmHg is in the normal to high-normal range. Worth keeping an eye on, particularly if you have other risk factors.

140/90 mmHg or above is classed as high blood pressure (hypertension). At this level, your GP will likely recommend lifestyle changes and may consider medication.

180/120 mmHg or above is a hypertensive crisis. This requires urgent medical attention, especially if accompanied by symptoms like chest pain, severe headache, or blurred vision.

90/60 mmHg or below is considered low blood pressure. It is usually harmless, but can cause dizziness or fainting in some people.

One high reading does not necessarily mean you have hypertension. Stress, caffeine, rushing, or even nerves in a clinical setting (known as white coat hypertension) can temporarily push your numbers up. That is why repeated measurements over time give a more reliable picture.

Persistently high blood pressure damages your blood vessels and the organs they supply. Over time, it significantly increases your risk of heart attack, stroke, kidney disease, vision problems, and vascular dementia.

It is one of the biggest preventable risk factors for cardiovascular disease, which remains the leading cause of death in the UK.

The difficult part is that you can feel perfectly well while your blood pressure is dangerously high. There are usually no headaches, no dizziness, no warning signs at all. The damage happens silently, over years, until something goes wrong.

This is exactly why regular monitoring is so important. You cannot manage what you do not measure.

The NHS recommends that all adults over 40 have their blood pressure checked at least every five years. If you have additional risk factors, more frequent checks are advised.

You may be at higher risk if you are overweight, eat a lot of salt, drink regularly, smoke, do not exercise much, have a family history of hypertension, are of African or Caribbean descent, or have diabetes or kidney disease.

Even if none of these apply to you, a quick check gives you a baseline and peace of mind.

At Rank Pharmacy, we offer free NHS blood pressure checks with no appointment needed. It takes a few minutes and could flag something you would otherwise never know about.

A standard blood pressure check gives you a snapshot, a single reading at a single point in time. For many people, that is enough. But in some cases, your GP or pharmacist may recommend 24-hour ambulatory blood pressure monitoring (ABPM).

ABPM involves wearing a small, portable monitor on your arm for a full 24 hours. The device automatically takes readings at regular intervals throughout the day and night, including while you sleep.

This gives a much more detailed picture of how your blood pressure behaves in your normal daily routine, away from the clinical environment.

ABPM is particularly useful for diagnosing white coat hypertension (where your readings are high in a clinic but normal at home), masked hypertension (where your readings are normal in a clinic but high at home), and for monitoring how well blood pressure medication is working throughout the day.

At Rank Pharmacy, we offer ABPM as part of our clinical services. You collect the monitor, wear it for 24 hours while going about your normal day, and return it the following day. We then analyse the data and provide a full report for you and your GP.

If your blood pressure is higher than ideal, there is plenty you can do before medication becomes necessary. Evidence shows that lifestyle changes can be highly effective.

Cutting down on salt is one of the most impactful changes. Most of us eat far more than the recommended 6g per day, largely through processed foods. Reading labels and cooking from scratch more often can make a noticeable difference.

Regular physical activity, even brisk walking for 30 minutes most days, helps keep blood vessels flexible and reduces pressure.

Maintaining a healthy weight matters too. Losing even a small amount of excess weight can bring your numbers down.

Reducing alcohol intake, managing stress, and stopping smoking all contribute to better cardiovascular health.

These are not dramatic changes. They are small, practical adjustments that add up over time. And if medication is needed, these habits make it work more effectively.

For some people, lifestyle changes alone are not enough to bring blood pressure into a healthy range. If your readings remain at 140/90 mmHg or above after making changes, your GP will likely recommend medication.

There are several types of blood pressure medication, including ACE inhibitors, calcium channel blockers, diuretics, and ARBs. Your GP will choose based on your age, ethnicity, and any other health conditions.

Most people tolerate blood pressure medication well, though side effects can occur. If you experience anything unusual, speak to your pharmacist or GP rather than stopping the medication on your own. Abruptly stopping can cause a dangerous rebound in blood pressure.

At Rank Pharmacy, we support patients on blood pressure medication through regular reviews, advice on managing side effects, and help organising your medicines if you are taking several different tablets.

We offer three key services related to blood pressure:

Free NHS Blood Pressure Checks: Walk in any time during opening hours. No appointment needed. We will take your reading, explain what it means, and advise on next steps if needed.

24-Hour Ambulatory Blood Pressure Monitoring (ABPM): A more detailed assessment for patients who need it. We fit the monitor, you wear it for 24 hours, and we produce a full report for you and your GP.

Ongoing Support: If you are already on blood pressure medication, we can help with medication reviews, adherence support, and answering any questions you have about your treatment.

Blood pressure is one of the simplest health markers to check and one of the most important. If you have not had yours checked recently, there is no reason to wait.