Hypertension — persistently elevated blood pressure — affects nearly one in three adults worldwide and is often called the “silent killer” because it frequently causes no symptoms until serious organ damage occurs. Regular monitoring is essential because you cannot reliably feel high blood pressure. Recognising warning signs of complications — and knowing your numbers — allows early intervention that prevents stroke, heart attack, kidney failure, and vision loss.
Common Causes and Risk Factors
- Primary (essential) hypertension — no single identifiable cause; develops gradually over years
- Family history — genetic predisposition significantly increases risk
- Age — blood vessel stiffness increases with age; risk rises after 40
- Obesity and sedentary lifestyle — major modifiable risk factors
- High sodium intake — excess salt retains fluid and raises pressure
- Chronic stress — sustained activation of the sympathetic nervous system
- Excessive alcohol — regular heavy drinking raises BP over time
- Smoking — damages blood vessel walls and accelerates atherosclerosis
- Secondary hypertension — caused by kidney disease, adrenal tumours, thyroid disorders, or sleep apnoea
- Certain medications — NSAIDs, decongestants, oral contraceptives, and steroids can raise BP
Warning Signs and Symptoms
- Severe headache — especially at the back of the head, though headache alone rarely indicates hypertension
- Visual disturbances — blurred vision, double vision, or floaters from hypertensive retinopathy
- Chest pain or tightness — possible angina or heart strain
- Shortness of breath — heart failure or pulmonary oedema
- Nosebleeds — occasionally associated with very high BP, but common in normotensive people too
- Dizziness or confusion — in hypertensive crisis
- Blood in urine or reduced urine output — kidney damage
- Pounding sensation in neck, chest, or ears — reported by some with elevated BP
Home Care and Prevention Steps
When to See a Doctor
- Home readings consistently above 140/90 mmHg on multiple days
- Any reading above 180/120 mmHg — seek urgent care if symptomatic
- New headache pattern, vision changes, or chest pain with elevated BP
- BP not controlled despite medication and lifestyle changes
- Planning pregnancy — hypertension requires pre-conception management
- Family history of early heart disease or stroke — start screening by age 30
Frequently Asked Questions
Can I have high blood pressure and feel perfectly fine?
Yes — this is the norm, not the exception. That is why regular screening matters. Damage to arteries, heart, kidneys, and eyes accumulates silently over years without treatment.
What BP number is considered hypertension?
Most guidelines define hypertension as consistent readings of 140/90 mmHg or higher. Stage 2 is 160/100 mmHg or above. Your doctor may use different targets if you have diabetes, kidney disease, or are over 80.
Does stress alone cause permanent hypertension?
Acute stress temporarily raises BP. Chronic stress contributes to sustained elevation through poor sleep, overeating, alcohol use, and reduced exercise. Managing stress is part of a complete BP plan — see our dedicated guide on the stress-BP connection.
Are home BP monitors accurate?
Validated upper-arm monitors are reliable when used correctly. Wrist monitors are less accurate. Have your home device checked against a clinic reading annually.