High blood pressure (hypertension) is the leading preventable cause of stroke, heart attack, and kidney failure worldwide. What makes it so dangerous is its silence — the vast majority of people with high blood pressure feel completely normal and have no idea anything is wrong, until a serious event occurs.
Understanding your blood pressure numbers and recognizing the warning signs could save your life.
What Do Blood Pressure Numbers Mean?
Blood pressure is measured as two numbers in millimeters of mercury (mmHg): systolic (the upper number, pressure when your heart beats) over diastolic (the lower number, pressure when your heart rests).
| Category | Systolic | Diastolic |
|---|---|---|
| Normal | < 120 | < 80 |
| Elevated | 120–129 | < 80 |
| Stage 1 Hypertension | 130–139 | 80–89 |
| Stage 2 Hypertension | ≥ 140 | ≥ 90 |
| Hypertensive Crisis | > 180 | > 120 |
Symptoms That May Indicate High Blood Pressure
Most people with hypertension have no symptoms at all. However, when blood pressure rises suddenly or reaches very high levels, you might experience:
- Severe headache, often at the back of the head, worse in the morning
- Dizziness or lightheadedness, particularly when standing up quickly
- Ringing or buzzing in the ears
- Shortness of breath during mild activity or when lying down
- Heart palpitations — an awareness of your heartbeat
- Unexplained nosebleeds
- Visual disturbances — blurred vision or seeing bright spots
These symptoms alone are not reliable indicators — many people experience them without high blood pressure, and many with dangerously high readings feel nothing unusual.
When to Call Emergency Services Immediately
A hypertensive crisis is a life-threatening emergency. Call an ambulance or go to the nearest emergency room immediately if blood pressure is over 180/120 mmHg AND you have any of:
- Chest pain or severe shortness of breath
- Sudden weakness or numbness on one side of the face, arm, or leg (stroke signs)
- Sudden difficulty speaking or understanding speech
- A severe headache described as “the worst of your life” — sudden onset
- Sudden vision loss in one or both eyes
- Confusion or altered consciousness
Do not drive yourself. Call for help.
Who Is at Risk?
Several factors raise your risk of developing hypertension:
- Age: Risk increases significantly after 40
- Family history: Hypertension runs in families
- Overweight or obesity: Extra body weight forces the heart to work harder
- High-sodium diet: Salt causes the body to retain fluid, raising blood volume
- Physical inactivity: A sedentary lifestyle weakens the cardiovascular system
- Smoking and heavy alcohol use: Both damage blood vessel walls
- Chronic stress: Ongoing psychological stress keeps blood pressure elevated
How Often Should You Check Your Blood Pressure?
- Under 40, no risk factors: At least once a year
- 40–59, or with risk factors: Every 6 months
- Over 60, or already diagnosed: Follow your doctor’s recommended schedule
A home blood pressure monitor is a worthwhile investment, especially if you have risk factors. The best time to measure is in the morning before eating and taking any medication.
Lifestyle Changes That Lower Blood Pressure
Medication is often necessary, but lifestyle changes are equally important — sometimes powerful enough to bring blood pressure into normal range without drugs:
- Reduce sodium: Aim for less than 5g of salt per day (less than 1 teaspoon)
- Eat more vegetables and fruits: The DASH diet is specifically designed to lower blood pressure
- Exercise regularly: At least 30 minutes of moderate activity five days per week
- Achieve a healthy weight: Even a 5kg weight loss can meaningfully lower blood pressure
- Limit alcohol: No more than 1–2 standard drinks per day
- Quit smoking
- Manage stress: Through exercise, sleep, and relaxation techniques
At Ky Hoa Medical Center, blood pressure monitoring and cardiovascular screening are part of our comprehensive health check packages. Contact 028.3868.1097 to schedule your check-up.