One of the most dangerous aspects of hypertension is that you may not know that you have it. There are generally no symptoms of high blood pressure, so you usually don't feel it. In fact, nearly one-third of people who have hypertension don't know it. The only way to find out if you have high blood pressure is to get your blood pressure checked on a regular basis. This is especially important if you have a close relative who has high blood pressure.

If your blood pressure is extremely high, there may be certain symptoms to look out for, including: