High blood pressure (hypertension): symptoms, tests, treatment and which doctor to see
What high blood pressure is, why it rarely causes symptoms, how it is confirmed, how it is treated, and when to see a doctor or a cardiologist.
Also known as: Benign essential hypertension; Blood Pressure; Essential hypertension; HBP; HTN; Hypertension
What high blood pressure is
Blood pressure is the force of blood pushing against the walls of your arteries as the heart pumps. It is written as two numbers: the upper (systolic) figure is the pressure when the heart beats, and the lower (diastolic) figure is the pressure while the heart rests between beats. High blood pressure, or hypertension, means that pressure stays above the healthy range most of the time, not just for a few minutes when you are anxious or have climbed the stairs.
Over years, raised pressure strains the heart and stiffens and damages the arteries. It is one of the main causes of heart attack, stroke, heart failure and kidney disease, and it also harms the small vessels at the back of the eye. The good news is that lowering blood pressure reduces these risks, whatever your age when you start.
In most adults there is no single cause; doctors call this primary or essential hypertension. In a smaller group, an underlying problem such as kidney disease, a hormone disorder, sleep apnoea or a medicine is responsible. This is called secondary hypertension, and it is looked for more carefully in young people and in those whose pressure is very hard to control.
Symptoms — usually none
High blood pressure is often called a silent condition, and for good reason. Most people feel completely well and find out only when a reading is taken at a clinic, a pharmacy, a workplace check or before surgery. Feeling fine is not a sign that your pressure is normal.
When pressure is very high, some people notice:
- Headache, often at the back of the head and worse in the morning
- Dizziness or a feeling of unsteadiness
- Nosebleeds that are hard to stop
- Breathlessness on exertion or when lying flat
- Chest pain or a pounding heartbeat
- Blurred vision
These symptoms have many other causes, so do not judge your blood pressure by how you feel. The only way to know is to measure it.
Who is at higher risk in India
Blood pressure tends to rise with age, but hypertension is now commonly found in people in their thirties and forties. Indian diets can be heavy in hidden salt — pickles, papad, namkeen, chutney powders, instant noodles, bakery items and restaurant food — on top of the salt added during cooking. Your risk is higher if you:
- Have a parent, brother or sister with high blood pressure
- Eat a lot of salty or processed food
- Carry extra weight, especially around the waist
- Are physically inactive for most of the day
- Use tobacco in any form, or drink alcohol regularly
- Have diabetes or kidney disease
- Sleep poorly or snore heavily, which can be a sign of sleep apnoea
- Had high blood pressure or pre-eclampsia during a pregnancy
Under the national programme for non-communicable diseases, people aged 30 and above can be screened for high blood pressure and diabetes at government health facilities, including Ayushman Arogya Mandirs. If you have never had your pressure checked, that is an easy place to start.
How it is diagnosed
A single high reading is not enough to make the diagnosis. Blood pressure varies through the day and rises with stress, pain, caffeine and rushing to an appointment. Your doctor will usually confirm it with:
- Blood pressure measurement at the clinic, repeated on more than one visit, with you seated and rested and the right cuff size for your arm.
- Home blood pressure monitoring with a validated automatic upper-arm machine, taking readings at set times over several days.
- Ambulatory blood pressure monitoring, where you wear a cuff for a day and a night and it records automatically. This helps when clinic and home readings disagree.
Some people read high only at the clinic (white-coat hypertension), and others read normal at the clinic but high at home (masked hypertension). Home or ambulatory readings help sort this out.
Once the diagnosis is made, a few tests look for causes and for any effect on the body so far: a urine test for protein, kidney function tests, blood sugar, cholesterol, sodium and potassium, and an ECG to look at the heart. Some people also need an echocardiogram or an eye examination.
Which doctor to see
Most people with high blood pressure are diagnosed and treated well by a general physician. A cardiologist is worth seeing when:
- Your pressure stays high despite three or more medicines
- You already have heart disease, heart failure or have had a stroke
- An ECG or echocardiogram shows the heart has been affected
- You are young, or your pressure rose suddenly, and a secondary cause is possible
A nephrologist is involved when the kidneys are affected or kidney disease may be the cause, and an endocrinologist when a hormone problem is suspected. You can find cardiologists in Bengaluru or general physicians in Bengaluru on The Doctor Index, each with a registration you can check.
Treatment
The aim is to bring your pressure into a range agreed with your doctor and keep it there, to lower your risk of heart attack, stroke and kidney damage. Your target depends on your age, other conditions and how well you tolerate treatment.
Lifestyle changes
Reducing salt is one of the most effective changes. Cook with less, avoid adding salt at the table, and cut down on pickles, papad, packaged snacks and takeaway food. Eat more vegetables, fruit, pulses and whole grains; stay active on most days; lose weight if you carry extra; limit alcohol; and stop tobacco completely. For some people with mildly raised pressure, these changes alone are enough. For others they make medicines work better and may mean fewer of them are needed.
Medicines
Several families of medicine lower blood pressure. The commonly used ones are ACE inhibitors, angiotensin receptor blockers, calcium channel blockers and thiazide-type diuretics; beta blockers are used in particular situations, such as after a heart attack. Many people need two or more, and combination tablets can reduce the number of pills. Your doctor will choose based on your other conditions, your kidney function and any side effects. Some blood pressure medicines are not safe in pregnancy, so tell your doctor if you are planning one.
Blood pressure medicines usually need to be taken for the long term. Do not stop or reduce them on your own because your readings look normal — they look normal because the medicine is working. If a tablet gives you side effects, such as a dry cough or ankle swelling, ask your doctor about an alternative.
Living with it: the checks that matter
- Check your pressure at home if your doctor advises it, and keep a written or phone record to bring to each visit
- Review with your doctor every few weeks while treatment is being adjusted, then at regular intervals once it is stable
- Kidney function, potassium, sugar and cholesterol at least once a year, or more often on some medicines
- An ECG and an eye check when your doctor advises
Take your readings sitting quietly for a few minutes, back supported and arm resting at heart level, before coffee, tea or exercise. Wrist machines and old devices can be inaccurate; bring your machine to the clinic once so it can be checked against theirs.
When it is an emergency
Call 112 or 108, or go to the nearest emergency department, if a very high reading comes with any of these:
- Chest pain or tightness, or severe breathlessness
- Sudden weakness or numbness of the face, arm or leg, or difficulty speaking
- A sudden, severe headache, confusion or a fit
- Sudden loss or blurring of vision
- In pregnancy or soon after delivery: severe headache, visual disturbance, upper abdominal pain or sudden swelling of the face and hands
A high reading without symptoms is not usually an emergency, but it does need a doctor's review within a day or two. Rest for a few minutes and measure again before deciding.
Questions to ask at your appointment
- What range should my blood pressure be in, at the clinic and at home?
- Do I need home or ambulatory monitoring to confirm the diagnosis?
- Could anything else be causing my high blood pressure?
- What does each of my medicines do, and what side effects should I watch for?
- Which tests do I need, and how often?
- How much do my heart, kidneys and eyes need checking?
Common questions
Questions people ask
- Can I stop my blood pressure tablets once my readings are normal?
- Not on your own. Normal readings on treatment usually mean the medicine is working, and stopping it suddenly can let pressure rise again, sometimes quickly. A few people who make large lifestyle changes can reduce or stop medicines, but only under their doctor's supervision.
- Is a home blood pressure machine accurate?
- A validated automatic upper-arm machine with the correct cuff size is reliable for most people. Wrist and finger devices are less accurate. Take your machine to the clinic once so your doctor can compare its readings with theirs.
- Does high blood pressure cause headaches?
- Usually not. Most people with high blood pressure have no headache at all, and most headaches are not caused by blood pressure. A sudden, severe headache with a very high reading, however, needs urgent medical attention.
- Should I see a cardiologist or a general physician?
- A general physician can diagnose and manage most high blood pressure. A cardiologist is useful when the heart is already affected, when pressure is hard to control despite several medicines, or when you also have other heart disease.
This condition is usually assessed by a cardiologist. Every profile shows the doctor’s registration and what has been checked.
Sources
- MedlinePlus, US National Library of Medicine — High Blood Pressure
- World Health Organization — Hypertension fact sheet
- DD News — Government launches intensified NCD screening campaign for all citizens aged 30 and above
- MedlinePlus, National Library of Medicine — High Blood Pressure — Public-domain health-topic summary
- Human Phenotype Ontology Consortium — terminology definitions — HPO licence; definitions reproduced without alteration
High blood pressure (hypertension): symptoms, tests, treatment and which doctor to see is original text by The Doctor Index; the compiled source draft was used for research. Source: MedlinePlus, National Library of Medicine. Orphadata Science: Free access data from Orphanet. © INSERM 1999; July 2026 data, CC BY 4.0. This product uses the Human Phenotype Ontology (hp/releases/2026-09-01). Only sources listed for this article apply. Source material has been selected and arranged; HPO definitions are reproduced without alteration. No source organisation endorses this compilation. Köhler S et al. The Human Phenotype Ontology project: linking molecular biology and disease through phenotype data. Nucleic Acids Research 2014;42(D1):D966–D974. doi:10.1093/nar/gkt1026.
General information, not advice about your situation. Errors can be reported through the corrections process. Reference TDI-C-1161.