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Blood Pressure Control
Blood Pressure Basics; Photo of blood pressure pump

What Causes High Blood Pressure?

In most cases, the cause of high blood pressure is not known. This type of hypertension is often called essential hypertension. If high blood pressure is caused by a medical problem or medicine that you're taking, it is called secondary hypertension. Sometimes it can be caused by changes in your body, such as narrowed arteries, a greater quantity of blood than normal, or the heart beating faster and stronger than it should.

Although the cause may not be known, in most cases high blood pressure can be prevented or controlled by changing factors (called risk factors) that contribute to its development. Not all risk factors can be changed, but many can. The more risk factors you have, the greater your chance of developing hypertension, so its important to change the ones you can.

Controllable Risk Factors

Weight - Being overweight increases your risk of developing high blood pressure. In fact, blood pressure rises as body weight increases. Losing even 10 pounds can lower blood pressure.

Smoking - Each time you smoke a cigarette, your blood pressure rises. Nicotine causes a narrowing in small blood vessels, making blood flow more difficult. Smoking increases your risk of coronary heart disease.

Activity - Exercise strengthens your heart, lungs and muscles, relieves stress and helps lower blood pressure.

Healthy eating - Research has shown that following a healthy eating plan can both reduce the risk of developing high blood pressure and lower an already elevated blood pressure.

Stress - Stress can make blood pressure go up temporarily, and it may contribute hypertension. But its long-term effects are not clear. Stress management techniques do not seem to prevent high blood pressure. However, these techniques may help you feel better or help you control overeating.

Salt - Most people consume much more salt and sodium than they need. The current recommendation is to consume less than 1 teaspoon of salt a day. That includes all salt and sodium--containing cooking agents such as monosodium glutamate, baking powder and baking soda.

Alcohol - Drinking too much alcohol can raise blood pressure and harm your liver, brain and heart. Alcoholic drinks also have calories. If you are a woman who drinks alcoholic beverages, have only one drink a day; if you are a man, have only two drinks a day.

Oral contraceptives - Women taking oral contraceptives have a small increase in both systolic and diastolic blood pressure; usually these are still in the normal range. Women who also smoke and are over age 35 have a greater risk for stroke and heart disease. If you are a woman over 35 and you smoke and use oral contraceptives, see your health care provider about using other forms of contraception.

Publication Source: Well Advised, Second Edition, Text copyright © 2003 Park Nicollet Institute
Online Source: National Heart, Lung, and Blood Institute http://www.nhlbi.nih.gov
Online Editor: Rademaekers, Ed
Online Medical Reviewer: Godsey, Cynthia M.S., M.S.N., APRN
Online Medical Reviewer: Lambert, J.G. M.D.
Date Last Reviewed: 10/14/2006
Date Last Modified: 4/29/2007