Blood pressure of less than 140 over 90 is considered a normal reading for adults. A systolic pressure of 130 to 139 or a diastolic pressure of 85 to 89 needs to be watched carefully. A blood pressure reading equal to or greater than 140 over 90 is considered elevated or high. High blood pressure usually has no symptoms. In fact, many people have high blood pressure for years without knowing it.
Hypertension is the medical term for high blood pressure.
It doesn't refer to being tense, nervous or hyperactive. You can be a calm, relaxed person and still have high blood pressure. A single elevated blood pressure reading doesn't mean you have high blood pressure, but it's a sign that further observation is required. Ask your doctor how often you should check it or have it checked. Certain diseases, such as kidney disease, can cause high blood pressure.