What are the main causes of high blood pressure ?

what is the main cause of high blood pressure ?

kids
Heredity and stress
In 90 to 95 percent of high blood pressure cases, the cause is unknown. In fact, you can have high blood pressure for years without knowing it. That's why it's the 鈥渟ilent killer鈥?鈥?it creeps up on you. When the cause is unknown, you have what's called essential or primary hypertension. Factors that may lead to high blood pressure in the remaining 5鈥?0 percent of cases, which are known as secondary hypertension, include:
Kidney abnormality
A structural abnormality of the aorta (large blood vessel leaving the heart) existing since birth
Narrowing of certain arteries
These problems can usually be corrected. For example, doctors can repair a narrowed artery that supplies blood to a kidney. Most of these problems can be ruled out by a careful history, a physical examination and a few tests. Special tests are sometimes needed, but you don't usually have to stay in the hospital.
Your heart pumps blood through the body's arteries. The large arteries that leave your heart taper into smaller arteries called arterioles. The arterioles then taper into smaller vessels called capillaries, which supply oxygen and nutrients to all the organs of your body. The blood then returns to your heart through the veins.
Certain nerve impulses cause your arteries to dilate (become larger) or contract (become smaller). If these vessels are wide open, blood can flow through easily. If they're narrow, it's harder for the blood to flow through them, and the pressure inside them increases. Then high blood pressure may occur. When this happens, your heart becomes strained and blood vessels may become damaged. Changes in the vessels that supply blood to your kidneys and brain may cause these organs to be affected.

Your heart, brain and kidneys can handle increased pressure for a long time. That's why you can live for years without any symptoms or ill effects. But that doesn't mean it's not hurting you. High blood pressure is a major risk factor for stroke, heart attack, heart failure and kidney failure
Plaque in arteries. then you get the things thatdon't help when you have high BP like stress,eating wrong foods,over weight,too little exercise.
5 Steps You Can Follow

1. If you are a smoker, stop. Nicotine results in constriction of your arteries and increases your heart rate.
2. If you have to lose some pounds, do it; reducing blood pressure through diet and exercise normally reduces the need for medication.
3. If you love salty snack, cut it down. Salt does not cause high blood pressure in everyone, but lot of people experience trouble with it, so don鈥檛 take risk.
4. If you experience very stressful situation in your life, try to eliminate it, or learn stress management; biofeedback, meditation, and other relaxation techniques.
5. If you use alcohol to control stress, restrict its use. Though alcohol does not increase everybody鈥檚 blood pressure, but it may increase yours.
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