High blood pressure: the condition with no symptoms and the worst consequences

I have never once had a patient describe what high blood pressure feels like, because it does not feel like anything. What it does instead is work steadily on the arteries feeding the brain, the heart, the kidneys and the eyes, for years, without producing a single symptom worth complaining about. Then one morning something gives way.

That is the entire clinical problem, and it is why the advice around it can seem so insistent about a condition that appears to be doing nothing.

What the numbers mean

Blood pressure is written as two figures: the systolic, the pressure when the heart contracts, over the diastolic, the pressure between beats. Both matter.

• Normal — below 120/80
• Elevated — 120–129 systolic with a diastolic below 80. Nothing needs treating yet; this is the moment lifestyle change is most effective.
• Stage 1 hypertension — 130–139 over 80–89, confirmed on more than one occasion
• Stage 2 hypertension — 140/90 or above
• Needs same-day assessment — 180/120 or above, particularly with symptoms

One raised reading is not a diagnosis. Blood pressure moves with pain, anxiety, a rushed walk to the clinic and a full bladder. We diagnose on repeated readings, usually with a set taken at home over a week, because that set is a better predictor of what will happen to you than anything measured in a consulting room.

How to measure it properly at home

Most home readings that patients bring us are wrong in the same handful of ways, and the errors are large enough to change a treatment decision. Getting it right takes an extra two minutes.

1. Sit still for five minutes first. No talking, no phone, and empty your bladder beforehand.
2. Sit in a chair with your back supported and both feet flat on the floor — not on the bed, not cross-legged.
3. Rest your arm on a table so the cuff is level with your heart. An unsupported arm reads high.
4. Put the cuff on bare skin, not over a sleeve, snug enough to slip one finger under.
5. Take two readings a minute apart and record both. If they differ a lot, take a third.
6. Measure at the same two times each day — morning before medicines, and evening — for seven days before your appointment.

What actually lowers it without tablets

These are not token gestures; each has a measurable effect, and together they are equivalent to a medication for many people in the elevated or stage 1 range.

• Salt. This is the big one here. Most of the excess is not the salt cellar — it is achaar, papad, packaged masala mixes, stock cubes, biscuits and bread. Cooking with less salt and removing the cellar from the table can drop systolic pressure by several points within weeks.
• Weight. Losing even five kilograms produces a reliable fall in blood pressure.
• Walking. Thirty minutes on most days, at a pace that makes conversation slightly effortful.
• Tobacco in every form — cigarettes, huqqa, naswar, gutka. Each one raises pressure acutely and damages arteries chronically.
• Sleep. Untreated obstructive sleep apnoea — loud snoring with pauses, and daytime sleepiness — is a genuinely common and genuinely treatable cause of blood pressure that will not come down. Mention the snoring; it is not a trivial detail.

“If a patient tells me they have cut down on salt and their pressure has not moved, we look at the pickle jar, the biscuits and the ready masala. The salt cellar is rarely the culprit.”

The mistake that undoes all of it

Blood pressure tablets do not cure hypertension. They control it, for as long as you take them. So when the reading comes down to normal, that reading is evidence the tablet is working — not evidence you no longer need it. Stopping at that point returns your pressure to where it was within days, usually without you noticing.

If side effects are the reason you want to stop — a dry cough, ankle swelling, dizziness, effects on sexual function — say so plainly. There are several drug classes and we can almost always find one that suits you. What we cannot do is fix a problem nobody mentioned.

When a high reading is an emergency

Most high readings, even quite high ones, are not emergencies and do not need anything dramatic. What makes it urgent is the company the number keeps.

If you are over thirty-five and cannot remember the last time your blood pressure was measured, that is reason enough to come in. It takes two minutes, and about a third of the people we check are surprised by the result.