Think you might have low blood pressure? The most common symptoms of low blood pressure are lightheadedness, dizziness, and fainting -- usually when you're going from a lying down or sitting position to a standing position. I have low blood pressure. Here are 5 things that initially surprised me about low blood pressure, plus some low blood pressure treatment ideas for you to try.Think you might have low blood pressure? The most common symptoms of low blood pressure are lightheadedness, dizziness, and fainting -- usually when you're going from a lying down or sitting position to a standing position. I have low blood pressure. Here are 5 things that initially surprised me about low blood pressure, plus some low blood pressure treatment ideas for you to try.