Blood pressure is usually measured on a variety of different days and once you are at rest. You are said to have high blood pressure if several of these measurements are too high, even if only one of the two — either the systolic or the diastolic one — is high. In adults, blood pressure is considered to be normal under a systolic value of 140 mm Hg and under a diastolic value of 90 mm Hg. When taking your vital sign for the first time, because it's sometimes high on just one side, it is practical to test the blood pressure in both arms. The values that are higher are always those used for assessing the pressure your blood exerts. After several testings, it is adequate to test the blood pressure only within the arm that produced the higher reading. A person is taken into account to possess high blood pressure if the systolic value is over 140 mmHg, the diastolic value is over 90 mmHg, or if both are higher than these readings. High blood pressure itself usually goes unnoticed. It can result in symptoms like dizziness and trouble seeing when it is extremely high. High blood pressure increases your risk of cardiovascular problems like heart attacks, strokes, and heart and kidney failure over the long term. So if you or your doctor think you have high blood pressure, it's important to have your blood pressure checked regularly. If the readings are repeatedly too high, there are several alternative ways of lowering your blood pressure and decreasing the danger of long-term health consequences.