Hypertension means high blood pressure. This generally means:
Systolic Blood Pressure is consistently over 140 (systolic is the “top” number of your blood pressure measurement, which represents the pressure generated when the heart beats)
Diastolic Blood Pressure is consistently over 90 (diastolic is the “bottom” number of your blood pressure measurement, which represents the pressure in the vessels when the heart is at rest)
Blood pressure is determined by the amount of blood pumped by the heart, and the size and condition of the arteries. Many other factors can affect blood pressure, including volume of water in the body; salt content of the body; condition of the kidneys, nervous system, or blood vessels; and levels of various hormones in the body.
Hypertension is controllable with treatment. It requires lifelong monitoring, and the treatment may require adjustments periodically.