Blood pressure that is higher than 140/90 most of the time is considered high blood pressure. It can be caused by a variety of factors like smoking, unhealthy lifestyle with lack of physical activity, exaggerated intake of salt, stress and age.  Increased blood pressure is a serious health condition that can cause serious complications like heart attack, stroke, kidney failure, sight problems. To avoid the complications it is necessary to keep the blood pressure in normal range which can be done with some slight changes in lifestyle.