Understanding Your Blood Pressure Numbers and How to Lower Them

High blood pressure is often called the silent condition because most people with it have no symptoms at all. It is usually found during a routine check rather than because something felt wrong. That is exactly why the numbers are worth understanding.

What the two numbers mean

A reading is written as one number over another, for example 118/76 mmHg.

•     Systolic, the top number, is the pressure in your arteries when the heart beats

•     Diastolic, the bottom number, is the pressure between beats when the heart is refilling

Both numbers matter. A raised reading in either one places you in a higher category.

Blood pressure categories

Category	Systolic (mmHg)	Rule	Diastolic (mmHg)
Normal	Below 120	and	Below 80
Elevated	120 to 129	and	Below 80
Stage 1 high	130 to 139	or	80 to 89
Stage 2 high	140 or above	or	90 or above
Crisis, seek care now	Above 180	and / or	Above 120

A single high reading does not mean you have high blood pressure. Readings move with stress, caffeine, activity, a full bladder and the discomfort of being at a clinic. Diagnosis is based on repeated measurements taken on separate occasions.

Measuring accurately at home

1.   Sit quietly for five minutes before measuring

2.   Avoid caffeine, exercise and smoking for 30 minutes beforehand

3.   Sit with back supported, feet flat, arm resting at heart level

4.   Place the cuff on bare skin, not over a sleeve

5.   Take two readings a minute apart and record both

6.   Measure at the same times each day, commonly morning and evening

What raises blood pressure

•     High sodium intake, mostly from packaged and restaurant food rather than the salt shaker

•     Excess body weight, which is one of the strongest modifiable factors

•     Physical inactivity

•     Regular heavy alcohol use

•     Smoking, which raises pressure acutely and damages arteries over time

•     Poor or insufficient sleep, including untreated sleep apnoea

•     Chronic stress, partly directly and partly through its effect on the behaviours above

•     Family history and age, which you cannot change but which make the rest matter more

Changes that lower readings most

• Losing excess weight has the largest effect for most people. Even modest weight loss produces measurable reductions.

• Reducing sodium works, and the practical route is cutting processed food, bread, sauces, snacks and restaurant meals rather than cooking without salt.

• Regular aerobic exercise, around 30 minutes on most days, lowers readings reliably. Walking counts.

• Increasing potassium through vegetables, fruit, beans and nuts helps balance sodium. Check with a doctor first if you have kidney disease.

• Cutting back alcohol and treating poor sleep both produce real changes that are often overlooked.

When to seek medical care

See a doctor if home readings are consistently 130/80 or above. Seek immediate care if a reading is above 180/120, particularly with chest pain, breathlessness, severe headache, vision changes, weakness or difficulty speaking.

Frequently asked questions

1. Does high blood pressure have symptoms? Usually not. Headaches and nosebleeds are not reliable indicators, which is why regular measurement matters.

2. Can lifestyle changes replace medication? Sometimes, in milder cases and under medical supervision. Never stop prescribed medication on your own.

3. Why is my reading higher at the clinic? This is common and known as white coat effect. Home readings taken correctly are often more representative.

This article is general information, not medical advice. Blood pressure management should be guided by a qualified healthcare professional.