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But this is a temporary, non permanent raising of blood pressure levels used quite normally by the human body to prepare you to respond to ‘threats’.
This is often called the fight-or-flight response. However, it’s not necessarily correct to say that everyday stress causes permanently high blood pressure (hypertension). Stress can cause temporary high blood pressure level, but these high levels will revert to normal once the source of your stress is removed and you are able to relax.
Research has shown no evidence that regular short term increases in blood pressure, that are due to stress, do any permanent damage to your blood vessels or internal organs. Long term stress that causes high blood pressure levels for sustained periods of time is a much more serious thing than short term stress. Long term stress is a major cause of hypertension, and hypertension can and does lead to some very serious health problems. A large number of things have been found to increase blood pressure everything from hearing a baby cry to watching sport on TV.
But none of these things alone will cause long term high blood pressure.
It’s only when your body is subjected to continuously raised blood pressure levels over long periods of time that there’s any danger. Scientific research has also shown that long term stress does play a role in the increased risk of hypertension, but numerous other factors need also be considered, among them obesity, exercise, smoking, and psychological concerns like depression and anxiety levels. This all becomes a cycle when you consider that excess stress itself leads to many of the other contributing factor of hypertension.
Highly stressed people often overeat, take little exercise and smoke more. Long Term Stress can cause High Blood Pressure Regular stress suffered of extended periods of time can cause hypertension through the repeated raising of blood pressure levels as well as by stimulation of the nervous system to produce large amounts of vasoconstricting (artery tightening) hormones that increase blood pressure. Factors affecting blood pressure through long term stress include job strain, race, social environment, and emotional distress. When one or more risk factors for high blood pressure are coupled together with other stress producing factors, the effect on blood pressure is multiplied.
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Source: (stress and hypertension) http://www.symptoms-of-stress.com/stress-blood-pressure.php