Hypertension is the medical term for high blood pressure. Blood pressure measures how hard your blood pushes against the walls of your arteries (the tubes that carry blood from your heart to the rest of your body). When that pressure stays too high for too long, doctors call it hypertension.

Think of it like a garden hose: if water flows through gently, everything works fine. But if too much pressure builds up inside, the hose can weaken or even burst. Similarly, hypertension can damage your arteries and organs over time, which is why doctors take it seriously.

Most people with hypertension don't feel sick at all, which is why it's sometimes called a “silent” condition. That's one reason doctors check your blood pressure during checkups, even when you feel perfectly healthy. They wrap that inflatable cuff around your arm and measure the pressure to see whether your blood pressure is normal or elevated.

Many things can contribute to hypertension: eating too much salt, not exercising enough, or family genetics. The good news is that hypertension can usually be managed through healthier eating, regular exercise, and sometimes medicine. When you hear adults talking about “watching their blood pressure” or “cutting back on salt,” they're working to prevent or control hypertension.