High blood pressure: symptoms, risks and how to control it

Hypertension is one of the most common chronic conditions worldwide and often progresses for years without any symptoms — which is why it is called the “silent killer.” Early detection and good control protect the heart, brain and kidneys from serious complications.

Key symptoms

The most deceptive thing about hypertension is that it usually causes no symptoms — which is why regular measurement is the only reliable way to catch it. When pressure rises markedly you may occasionally notice:

• Persistent or early-morning headaches
• Dizziness or ringing in the ears
• Palpitations and fatigue
• Shortness of breath or chest discomfort
• Occasional nosebleeds

Risk factors

Hypertension doesn't appear overnight; it builds up over years. The main contributors are:

• Excess weight and inactivity
• High intake of salt, processed and fatty food
• Smoking and heavy alcohol use
• Chronic stress and poor sleep
• A family history of hypertension and increasing age

What do the numbers mean?

Blood pressure is written as two numbers: systolic (upper) and diastolic (lower). A general guide: below 120/80 mm Hg is normal; 120–139 / 80–89 is high-normal (watch it); 140/90 or higher (on repeated readings) is hypertension. A single high reading is not a diagnosis — what matters is repeated values on different days.

How to keep it under control

Mild to moderate hypertension can often be managed with lifestyle alone. These steps lower pressure and protect the heart:

• Keep daily salt intake below 5 grams
• Do at least 150 minutes of brisk activity a week
• Quit smoking and limit alcohol
• Maintain a healthy weight and eat more vegetables and fruit (the DASH diet)
• Measure and log your blood pressure at home and reduce stress

When is medication needed?

When lifestyle changes aren't enough, or pressure is high from the start, a doctor may start blood-pressure medication. Stopping these on your own is dangerous — because hypertension is symptomless, you may feel fine while the medication keeps protecting your vessels and organs. Uncontrolled hypertension can lead to heart attack, stroke, kidney failure and vision loss.

When to see a doctor

Call for emergency care if your reading is above 180/120 mm Hg, or with severe headache, chest pain, shortness of breath or vision changes. For persistent readings of 140/90 or higher, see a cardiologist for a planned review.

Frequently asked questions

What is a normal blood pressure?

For most adults the ideal is around 120/80 mm Hg. Repeated readings of 140/90 or higher are considered hypertension.

How do I measure blood pressure correctly at home?

Avoid coffee and smoking for 30 minutes beforehand, sit quietly for 5 minutes, keep your arm at heart level, and measure at the same time morning and evening.

Do I have to take blood-pressure medication for life?

Treatment is often long-term, but with weight loss and a healthy lifestyle some people can reduce their dose. Only a doctor decides — never stop the medication on your own.

This article is for information only and does not replace a doctor's advice.