hypertension can result from too much fluid in normal blood vessels or from normal fluid in narrow blood vessels. blood pressure measures the force of blood against the walls of your blood vessels. blood pressure that remains high over time is called hypertension. extra fluid in your body increases the amount of fluid in your blood vessels and makes your blood pressure higher. narrow or clogged blood vessels also raise your blood pressure. if you have high blood pressure see your doctor regularly.
what is high blood pressure?